Home / 13,679.97-18,876.28-7,711.54

Finding the Fourth Proportional to 13,679.97, 18,876.28 and 7,711.54

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Solution

The fourth proportional to 13,679.97, 18,876.28 and 7,711.54 is: 10,640.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.97 : 18,876.28 = 7,711.54 : x
  2. Step 2: Convert to fraction form
    13,679.97/18,876.28 = 7,711.54/x
  3. Step 3: Cross multiply
    13,679.97x = 18,876.28 × 7,711.54
  4. Step 4: Simplify right side
    13,679.97x = 145,565,188.27
  5. Step 5: Solve for x
    x = 145,565,188.27/13,679.97
  6. Step 6: Final answer
    x = 10,640.75

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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.