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Finding the Fourth Proportional to 42,671.26, 63,979.41 and 17,728.52

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Solution

The fourth proportional to 42,671.26, 63,979.41 and 17,728.52 is: 26,581.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,671.26 : 63,979.41 = 17,728.52 : x
  2. Step 2: Convert to fraction form
    42,671.26/63,979.41 = 17,728.52/x
  3. Step 3: Cross multiply
    42,671.26x = 63,979.41 × 17,728.52
  4. Step 4: Simplify right side
    42,671.26x = 1,134,260,249.77
  5. Step 5: Solve for x
    x = 1,134,260,249.77/42,671.26
  6. Step 6: Final answer
    x = 26,581.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.