Home / 10,539.30-15,809.85-3,143.28

Finding the Fourth Proportional to 10,539.30, 15,809.85 and 3,143.28

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Solution

The fourth proportional to 10,539.30, 15,809.85 and 3,143.28 is: 4,715.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,539.30 : 15,809.85 = 3,143.28 : x
  2. Step 2: Convert to fraction form
    10,539.30/15,809.85 = 3,143.28/x
  3. Step 3: Cross multiply
    10,539.30x = 15,809.85 × 3,143.28
  4. Step 4: Simplify right side
    10,539.30x = 49,694,785.31
  5. Step 5: Solve for x
    x = 49,694,785.31/10,539.30
  6. Step 6: Final answer
    x = 4,715.19

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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.