Home / 13,729.85-18,947.52-7,761.88

Finding the Fourth Proportional to 13,729.85, 18,947.52 and 7,761.88

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Solution

The fourth proportional to 13,729.85, 18,947.52 and 7,761.88 is: 10,711.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,729.85 : 18,947.52 = 7,761.88 : x
  2. Step 2: Convert to fraction form
    13,729.85/18,947.52 = 7,761.88/x
  3. Step 3: Cross multiply
    13,729.85x = 18,947.52 × 7,761.88
  4. Step 4: Simplify right side
    13,729.85x = 147,068,293.64
  5. Step 5: Solve for x
    x = 147,068,293.64/13,729.85
  6. Step 6: Final answer
    x = 10,711.57

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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.