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Finding the Fourth Proportional to 13,115.14, 18,098.98 and 7,146.79

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Solution

The fourth proportional to 13,115.14, 18,098.98 and 7,146.79 is: 9,862.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,115.14 : 18,098.98 = 7,146.79 : x
  2. Step 2: Convert to fraction form
    13,115.14/18,098.98 = 7,146.79/x
  3. Step 3: Cross multiply
    13,115.14x = 18,098.98 × 7,146.79
  4. Step 4: Simplify right side
    13,115.14x = 129,349,546.16
  5. Step 5: Solve for x
    x = 129,349,546.16/13,115.14
  6. Step 6: Final answer
    x = 9,862.61

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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.