Home / 20,949.30-28,909.71-11,517.66

Finding the Fourth Proportional to 20,949.30, 28,909.71 and 11,517.66

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Solution

The fourth proportional to 20,949.30, 28,909.71 and 11,517.66 is: 15,894.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.30 : 28,909.71 = 11,517.66 : x
  2. Step 2: Convert to fraction form
    20,949.30/28,909.71 = 11,517.66/x
  3. Step 3: Cross multiply
    20,949.30x = 28,909.71 × 11,517.66
  4. Step 4: Simplify right side
    20,949.30x = 332,972,210.48
  5. Step 5: Solve for x
    x = 332,972,210.48/20,949.30
  6. Step 6: Final answer
    x = 15,894.19

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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.