Home / 20,565.90-28,380.95-11,134.47

Finding the Fourth Proportional to 20,565.90, 28,380.95 and 11,134.47

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Solution

The fourth proportional to 20,565.90, 28,380.95 and 11,134.47 is: 15,365.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,565.90 : 28,380.95 = 11,134.47 : x
  2. Step 2: Convert to fraction form
    20,565.90/28,380.95 = 11,134.47/x
  3. Step 3: Cross multiply
    20,565.90x = 28,380.95 × 11,134.47
  4. Step 4: Simplify right side
    20,565.90x = 316,006,836.35
  5. Step 5: Solve for x
    x = 316,006,836.35/20,565.90
  6. Step 6: Final answer
    x = 15,365.57

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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.