Home / 10,221.20-15,331.80-9,297.80

Finding the Fourth Proportional to 10,221.20, 15,331.80 and 9,297.80

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Solution

The fourth proportional to 10,221.20, 15,331.80 and 9,297.80 is: 13,946.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,221.20 : 15,331.80 = 9,297.80 : x
  2. Step 2: Convert to fraction form
    10,221.20/15,331.80 = 9,297.80/x
  3. Step 3: Cross multiply
    10,221.20x = 15,331.80 × 9,297.80
  4. Step 4: Simplify right side
    10,221.20x = 142,552,010.04
  5. Step 5: Solve for x
    x = 142,552,010.04/10,221.20
  6. Step 6: Final answer
    x = 13,946.70

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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.