Home / 12,747.78-17,591.58-7,711.20

Finding the Fourth Proportional to 12,747.78, 17,591.58 and 7,711.20

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Solution

The fourth proportional to 12,747.78, 17,591.58 and 7,711.20 is: 10,641.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,747.78 : 17,591.58 = 7,711.20 : x
  2. Step 2: Convert to fraction form
    12,747.78/17,591.58 = 7,711.20/x
  3. Step 3: Cross multiply
    12,747.78x = 17,591.58 × 7,711.20
  4. Step 4: Simplify right side
    12,747.78x = 135,652,191.70
  5. Step 5: Solve for x
    x = 135,652,191.70/12,747.78
  6. Step 6: Final answer
    x = 10,641.24

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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.