Home / 20,948.87-28,909.64-11,517.50

Finding the Fourth Proportional to 20,948.87, 28,909.64 and 11,517.50

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Solution

The fourth proportional to 20,948.87, 28,909.64 and 11,517.50 is: 15,894.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,948.87 : 28,909.64 = 11,517.50 : x
  2. Step 2: Convert to fraction form
    20,948.87/28,909.64 = 11,517.50/x
  3. Step 3: Cross multiply
    20,948.87x = 28,909.64 × 11,517.50
  4. Step 4: Simplify right side
    20,948.87x = 332,966,778.70
  5. Step 5: Solve for x
    x = 332,966,778.70/20,948.87
  6. Step 6: Final answer
    x = 15,894.26

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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.