Home / 10,520.91-15,781.41-3,125.44

Finding the Fourth Proportional to 10,520.91, 15,781.41 and 3,125.44

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Solution

The fourth proportional to 10,520.91, 15,781.41 and 3,125.44 is: 4,688.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,520.91 : 15,781.41 = 3,125.44 : x
  2. Step 2: Convert to fraction form
    10,520.91/15,781.41 = 3,125.44/x
  3. Step 3: Cross multiply
    10,520.91x = 15,781.41 × 3,125.44
  4. Step 4: Simplify right side
    10,520.91x = 49,323,772.24
  5. Step 5: Solve for x
    x = 49,323,772.24/10,520.91
  6. Step 6: Final answer
    x = 4,688.16

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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.