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Finding the Fourth Proportional to 5,781.61, 8,672.27 and 1,621.65

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Solution

The fourth proportional to 5,781.61, 8,672.27 and 1,621.65 is: 2,432.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,781.61 : 8,672.27 = 1,621.65 : x
  2. Step 2: Convert to fraction form
    5,781.61/8,672.27 = 1,621.65/x
  3. Step 3: Cross multiply
    5,781.61x = 8,672.27 × 1,621.65
  4. Step 4: Simplify right side
    5,781.61x = 14,063,411.06
  5. Step 5: Solve for x
    x = 14,063,411.06/5,781.61
  6. Step 6: Final answer
    x = 2,432.44

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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.