Home / 5,781.72-8,672.13-1,621.50

Finding the Fourth Proportional to 5,781.72, 8,672.13 and 1,621.50

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Solution

The fourth proportional to 5,781.72, 8,672.13 and 1,621.50 is: 2,432.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,781.72 : 8,672.13 = 1,621.50 : x
  2. Step 2: Convert to fraction form
    5,781.72/8,672.13 = 1,621.50/x
  3. Step 3: Cross multiply
    5,781.72x = 8,672.13 × 1,621.50
  4. Step 4: Simplify right side
    5,781.72x = 14,061,858.80
  5. Step 5: Solve for x
    x = 14,061,858.80/5,781.72
  6. Step 6: Final answer
    x = 2,432.12

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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.