Home / 10,520.80-15,781.11-3,125.32

Finding the Fourth Proportional to 10,520.80, 15,781.11 and 3,125.32

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Solution

The fourth proportional to 10,520.80, 15,781.11 and 3,125.32 is: 4,687.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,520.80 : 15,781.11 = 3,125.32 : x
  2. Step 2: Convert to fraction form
    10,520.80/15,781.11 = 3,125.32/x
  3. Step 3: Cross multiply
    10,520.80x = 15,781.11 × 3,125.32
  4. Step 4: Simplify right side
    10,520.80x = 49,321,018.71
  5. Step 5: Solve for x
    x = 49,321,018.71/10,520.80
  6. Step 6: Final answer
    x = 4,687.95

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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.