Home / 11,122.47-15,349.80-7,144.83

Finding the Fourth Proportional to 11,122.47, 15,349.80 and 7,144.83

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Solution

The fourth proportional to 11,122.47, 15,349.80 and 7,144.83 is: 9,860.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,122.47 : 15,349.80 = 7,144.83 : x
  2. Step 2: Convert to fraction form
    11,122.47/15,349.80 = 7,144.83/x
  3. Step 3: Cross multiply
    11,122.47x = 15,349.80 × 7,144.83
  4. Step 4: Simplify right side
    11,122.47x = 109,671,711.53
  5. Step 5: Solve for x
    x = 109,671,711.53/11,122.47
  6. Step 6: Final answer
    x = 9,860.37

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Half scale
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Double scale
Find fourth proportional to 11,123.47, 15,351.18 and 7,145.83
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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.