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Finding the Fourth Proportional to 12,711.64, 17,542.05 and 7,743.64

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Solution

The fourth proportional to 12,711.64, 17,542.05 and 7,743.64 is: 10,686.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,711.64 : 17,542.05 = 7,743.64 : x
  2. Step 2: Convert to fraction form
    12,711.64/17,542.05 = 7,743.64/x
  3. Step 3: Cross multiply
    12,711.64x = 17,542.05 × 7,743.64
  4. Step 4: Simplify right side
    12,711.64x = 135,839,320.06
  5. Step 5: Solve for x
    x = 135,839,320.06/12,711.64
  6. Step 6: Final answer
    x = 10,686.22

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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.