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Finding the Fourth Proportional to 13,679.52, 18,877.48 and 7,711.08

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Solution

The fourth proportional to 13,679.52, 18,877.48 and 7,711.08 is: 10,641.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.52 : 18,877.48 = 7,711.08 : x
  2. Step 2: Convert to fraction form
    13,679.52/18,877.48 = 7,711.08/x
  3. Step 3: Cross multiply
    13,679.52x = 18,877.48 × 7,711.08
  4. Step 4: Simplify right side
    13,679.52x = 145,565,758.48
  5. Step 5: Solve for x
    x = 145,565,758.48/13,679.52
  6. Step 6: Final answer
    x = 10,641.15

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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.