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Finding the Fourth Proportional to 13,387.16, 20,080.90 and 6,367.92

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Solution

The fourth proportional to 13,387.16, 20,080.90 and 6,367.92 is: 9,551.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,387.16 : 20,080.90 = 6,367.92 : x
  2. Step 2: Convert to fraction form
    13,387.16/20,080.90 = 6,367.92/x
  3. Step 3: Cross multiply
    13,387.16x = 20,080.90 × 6,367.92
  4. Step 4: Simplify right side
    13,387.16x = 127,873,564.73
  5. Step 5: Solve for x
    x = 127,873,564.73/13,387.16
  6. Step 6: Final answer
    x = 9,551.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.