Home / 21,003.76-31,489.99-9,155.28

Finding the Fourth Proportional to 21,003.76, 31,489.99 and 9,155.28

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Solution

The fourth proportional to 21,003.76, 31,489.99 and 9,155.28 is: 13,726.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,003.76 : 31,489.99 = 9,155.28 : x
  2. Step 2: Convert to fraction form
    21,003.76/31,489.99 = 9,155.28/x
  3. Step 3: Cross multiply
    21,003.76x = 31,489.99 × 9,155.28
  4. Step 4: Simplify right side
    21,003.76x = 288,299,619.46
  5. Step 5: Solve for x
    x = 288,299,619.46/21,003.76
  6. Step 6: Final answer
    x = 13,726.10

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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.