Home / 20,565.10-28,380.36-12,611.71

Finding the Fourth Proportional to 20,565.10, 28,380.36 and 12,611.71

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Solution

The fourth proportional to 20,565.10, 28,380.36 and 12,611.71 is: 17,404.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,565.10 : 28,380.36 = 12,611.71 : x
  2. Step 2: Convert to fraction form
    20,565.10/28,380.36 = 12,611.71/x
  3. Step 3: Cross multiply
    20,565.10x = 28,380.36 × 12,611.71
  4. Step 4: Simplify right side
    20,565.10x = 357,924,952.78
  5. Step 5: Solve for x
    x = 357,924,952.78/20,565.10
  6. Step 6: Final answer
    x = 17,404.48

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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.