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Finding the Fourth Proportional to 14,974.16, 20,665.32 and 8,687.12

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Solution

The fourth proportional to 14,974.16, 20,665.32 and 8,687.12 is: 11,988.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,974.16 : 20,665.32 = 8,687.12 : x
  2. Step 2: Convert to fraction form
    14,974.16/20,665.32 = 8,687.12/x
  3. Step 3: Cross multiply
    14,974.16x = 20,665.32 × 8,687.12
  4. Step 4: Simplify right side
    14,974.16x = 179,522,114.68
  5. Step 5: Solve for x
    x = 179,522,114.68/14,974.16
  6. Step 6: Final answer
    x = 11,988.79

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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.