Home / 8,378.28-11,560.68-5,731.92

Finding the Fourth Proportional to 8,378.28, 11,560.68 and 5,731.92

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Solution

The fourth proportional to 8,378.28, 11,560.68 and 5,731.92 is: 7,909.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,378.28 : 11,560.68 = 5,731.92 : x
  2. Step 2: Convert to fraction form
    8,378.28/11,560.68 = 5,731.92/x
  3. Step 3: Cross multiply
    8,378.28x = 11,560.68 × 5,731.92
  4. Step 4: Simplify right side
    8,378.28x = 66,264,892.91
  5. Step 5: Solve for x
    x = 66,264,892.91/8,378.28
  6. Step 6: Final answer
    x = 7,909.13

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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.