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Finding the Fourth Proportional to 12,661.86, 17,471.52 and 7,947.66

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Solution

The fourth proportional to 12,661.86, 17,471.52 and 7,947.66 is: 10,966.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,661.86 : 17,471.52 = 7,947.66 : x
  2. Step 2: Convert to fraction form
    12,661.86/17,471.52 = 7,947.66/x
  3. Step 3: Cross multiply
    12,661.86x = 17,471.52 × 7,947.66
  4. Step 4: Simplify right side
    12,661.86x = 138,857,700.64
  5. Step 5: Solve for x
    x = 138,857,700.64/12,661.86
  6. Step 6: Final answer
    x = 10,966.61

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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.