Home / 10,929.28-16,387.44-5,087.20

Finding the Fourth Proportional to 10,929.28, 16,387.44 and 5,087.20

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Solution

The fourth proportional to 10,929.28, 16,387.44 and 5,087.20 is: 7,627.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,929.28 : 16,387.44 = 5,087.20 : x
  2. Step 2: Convert to fraction form
    10,929.28/16,387.44 = 5,087.20/x
  3. Step 3: Cross multiply
    10,929.28x = 16,387.44 × 5,087.20
  4. Step 4: Simplify right side
    10,929.28x = 83,366,184.77
  5. Step 5: Solve for x
    x = 83,366,184.77/10,929.28
  6. Step 6: Final answer
    x = 7,627.78

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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.