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Finding the Fourth Proportional to 5,781.80, 8,672.68 and 1,621.80

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Solution

The fourth proportional to 5,781.80, 8,672.68 and 1,621.80 is: 2,432.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,781.80 : 8,672.68 = 1,621.80 : x
  2. Step 2: Convert to fraction form
    5,781.80/8,672.68 = 1,621.80/x
  3. Step 3: Cross multiply
    5,781.80x = 8,672.68 × 1,621.80
  4. Step 4: Simplify right side
    5,781.80x = 14,065,352.42
  5. Step 5: Solve for x
    x = 14,065,352.42/5,781.80
  6. Step 6: Final answer
    x = 2,432.69

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1.5x scale

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.