Home / 20,122.30-30,183.45-7,642.33

Finding the Fourth Proportional to 20,122.30, 30,183.45 and 7,642.33

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Solution

The fourth proportional to 20,122.30, 30,183.45 and 7,642.33 is: 11,463.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,122.30 : 30,183.45 = 7,642.33 : x
  2. Step 2: Convert to fraction form
    20,122.30/30,183.45 = 7,642.33/x
  3. Step 3: Cross multiply
    20,122.30x = 30,183.45 × 7,642.33
  4. Step 4: Simplify right side
    20,122.30x = 230,671,781.32
  5. Step 5: Solve for x
    x = 230,671,781.32/20,122.30
  6. Step 6: Final answer
    x = 11,463.49

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Half scale
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Double scale
Find fourth proportional to 20,123.30, 30,184.95 and 7,643.33
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.