Home / 15,817.20-21,829.92-9,102.70

Finding the Fourth Proportional to 15,817.20, 21,829.92 and 9,102.70

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Solution

The fourth proportional to 15,817.20, 21,829.92 and 9,102.70 is: 12,562.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,817.20 : 21,829.92 = 9,102.70 : x
  2. Step 2: Convert to fraction form
    15,817.20/21,829.92 = 9,102.70/x
  3. Step 3: Cross multiply
    15,817.20x = 21,829.92 × 9,102.70
  4. Step 4: Simplify right side
    15,817.20x = 198,711,212.78
  5. Step 5: Solve for x
    x = 198,711,212.78/15,817.20
  6. Step 6: Final answer
    x = 12,562.98

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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.