Home / 20,948.52-28,909.70-11,517.80

Finding the Fourth Proportional to 20,948.52, 28,909.70 and 11,517.80

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Solution

The fourth proportional to 20,948.52, 28,909.70 and 11,517.80 is: 15,894.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,948.52 : 28,909.70 = 11,517.80 : x
  2. Step 2: Convert to fraction form
    20,948.52/28,909.70 = 11,517.80/x
  3. Step 3: Cross multiply
    20,948.52x = 28,909.70 × 11,517.80
  4. Step 4: Simplify right side
    20,948.52x = 332,976,142.66
  5. Step 5: Solve for x
    x = 332,976,142.66/20,948.52
  6. Step 6: Final answer
    x = 15,894.97

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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.