Home / 13,432.20-18,531.13-7,765.91

Finding the Fourth Proportional to 13,432.20, 18,531.13 and 7,765.91

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Solution

The fourth proportional to 13,432.20, 18,531.13 and 7,765.91 is: 10,713.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,432.20 : 18,531.13 = 7,765.91 : x
  2. Step 2: Convert to fraction form
    13,432.20/18,531.13 = 7,765.91/x
  3. Step 3: Cross multiply
    13,432.20x = 18,531.13 × 7,765.91
  4. Step 4: Simplify right side
    13,432.20x = 143,911,087.78
  5. Step 5: Solve for x
    x = 143,911,087.78/13,432.20
  6. Step 6: Final answer
    x = 10,713.89

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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.