Home / 29,122.39-40,135.59-21,150.76

Finding the Fourth Proportional to 29,122.39, 40,135.59 and 21,150.76

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Solution

The fourth proportional to 29,122.39, 40,135.59 and 21,150.76 is: 29,149.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,122.39 : 40,135.59 = 21,150.76 : x
  2. Step 2: Convert to fraction form
    29,122.39/40,135.59 = 21,150.76/x
  3. Step 3: Cross multiply
    29,122.39x = 40,135.59 × 21,150.76
  4. Step 4: Simplify right side
    29,122.39x = 848,898,231.55
  5. Step 5: Solve for x
    x = 848,898,231.55/29,122.39
  6. Step 6: Final answer
    x = 29,149.33

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Find fourth proportional to 14,561.20, 20,067.80 and 10,575.38
Half scale
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Double scale
Find fourth proportional to 29,123.39, 40,136.97 and 21,151.76
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.