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Finding the Fourth Proportional to 8,739.41, 12,067.49 and 7,124.57

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Solution

The fourth proportional to 8,739.41, 12,067.49 and 7,124.57 is: 9,837.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,739.41 : 12,067.49 = 7,124.57 : x
  2. Step 2: Convert to fraction form
    8,739.41/12,067.49 = 7,124.57/x
  3. Step 3: Cross multiply
    8,739.41x = 12,067.49 × 7,124.57
  4. Step 4: Simplify right side
    8,739.41x = 85,975,725.21
  5. Step 5: Solve for x
    x = 85,975,725.21/8,739.41
  6. Step 6: Final answer
    x = 9,837.70

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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.