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Finding the Fourth Proportional to 5,781.15, 8,672.15 and 1,621.49

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Solution

The fourth proportional to 5,781.15, 8,672.15 and 1,621.49 is: 2,432.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,781.15 : 8,672.15 = 1,621.49 : x
  2. Step 2: Convert to fraction form
    5,781.15/8,672.15 = 1,621.49/x
  3. Step 3: Cross multiply
    5,781.15x = 8,672.15 × 1,621.49
  4. Step 4: Simplify right side
    5,781.15x = 14,061,765.20
  5. Step 5: Solve for x
    x = 14,061,765.20/5,781.15
  6. Step 6: Final answer
    x = 2,432.35

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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.