Home / 20,948.63-28,909.10-11,517.19

Finding the Fourth Proportional to 20,948.63, 28,909.10 and 11,517.19

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Solution

The fourth proportional to 20,948.63, 28,909.10 and 11,517.19 is: 15,893.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,948.63 : 28,909.10 = 11,517.19 : x
  2. Step 2: Convert to fraction form
    20,948.63/28,909.10 = 11,517.19/x
  3. Step 3: Cross multiply
    20,948.63x = 28,909.10 × 11,517.19
  4. Step 4: Simplify right side
    20,948.63x = 332,951,553.95
  5. Step 5: Solve for x
    x = 332,951,553.95/20,948.63
  6. Step 6: Final answer
    x = 15,893.72

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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.