Home / 10,311.90-15,468.09-2,520.78

Finding the Fourth Proportional to 10,311.90, 15,468.09 and 2,520.78

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Solution

The fourth proportional to 10,311.90, 15,468.09 and 2,520.78 is: 3,781.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,311.90 : 15,468.09 = 2,520.78 : x
  2. Step 2: Convert to fraction form
    10,311.90/15,468.09 = 2,520.78/x
  3. Step 3: Cross multiply
    10,311.90x = 15,468.09 × 2,520.78
  4. Step 4: Simplify right side
    10,311.90x = 38,991,651.91
  5. Step 5: Solve for x
    x = 38,991,651.91/10,311.90
  6. Step 6: Final answer
    x = 3,781.23

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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.