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Finding the Fourth Proportional to 3,899.61, 5,387.15 and 3,374.73

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Solution

The fourth proportional to 3,899.61, 5,387.15 and 3,374.73 is: 4,662.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,899.61 : 5,387.15 = 3,374.73 : x
  2. Step 2: Convert to fraction form
    3,899.61/5,387.15 = 3,374.73/x
  3. Step 3: Cross multiply
    3,899.61x = 5,387.15 × 3,374.73
  4. Step 4: Simplify right side
    3,899.61x = 18,180,132.91
  5. Step 5: Solve for x
    x = 18,180,132.91/3,899.61
  6. Step 6: Final answer
    x = 4,662.04

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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.