Home / 9,139.40-13,712.70-3,591.80

Finding the Fourth Proportional to 9,139.40, 13,712.70 and 3,591.80

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Solution

The fourth proportional to 9,139.40, 13,712.70 and 3,591.80 is: 5,389.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,139.40 : 13,712.70 = 3,591.80 : x
  2. Step 2: Convert to fraction form
    9,139.40/13,712.70 = 3,591.80/x
  3. Step 3: Cross multiply
    9,139.40x = 13,712.70 × 3,591.80
  4. Step 4: Simplify right side
    9,139.40x = 49,253,275.86
  5. Step 5: Solve for x
    x = 49,253,275.86/9,139.40
  6. Step 6: Final answer
    x = 5,389.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.