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Finding the Fourth Proportional to 13,663.38, 20,482.20 and 7,414.20

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Solution

The fourth proportional to 13,663.38, 20,482.20 and 7,414.20 is: 11,114.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,663.38 : 20,482.20 = 7,414.20 : x
  2. Step 2: Convert to fraction form
    13,663.38/20,482.20 = 7,414.20/x
  3. Step 3: Cross multiply
    13,663.38x = 20,482.20 × 7,414.20
  4. Step 4: Simplify right side
    13,663.38x = 151,859,127.24
  5. Step 5: Solve for x
    x = 151,859,127.24/13,663.38
  6. Step 6: Final answer
    x = 11,114.32

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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.