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Finding the Fourth Proportional to 13,691.16, 20,540.16 and 7,449.48

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Solution

The fourth proportional to 13,691.16, 20,540.16 and 7,449.48 is: 11,176.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,691.16 : 20,540.16 = 7,449.48 : x
  2. Step 2: Convert to fraction form
    13,691.16/20,540.16 = 7,449.48/x
  3. Step 3: Cross multiply
    13,691.16x = 20,540.16 × 7,449.48
  4. Step 4: Simplify right side
    13,691.16x = 153,013,511.12
  5. Step 5: Solve for x
    x = 153,013,511.12/13,691.16
  6. Step 6: Final answer
    x = 11,176.08

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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.