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Finding the Fourth Proportional to 12,711.15, 17,542.62 and 7,047.74

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Solution

The fourth proportional to 12,711.15, 17,542.62 and 7,047.74 is: 9,726.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,711.15 : 17,542.62 = 7,047.74 : x
  2. Step 2: Convert to fraction form
    12,711.15/17,542.62 = 7,047.74/x
  3. Step 3: Cross multiply
    12,711.15x = 17,542.62 × 7,047.74
  4. Step 4: Simplify right side
    12,711.15x = 123,635,868.54
  5. Step 5: Solve for x
    x = 123,635,868.54/12,711.15
  6. Step 6: Final answer
    x = 9,726.57

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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.