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Finding the Fourth Proportional to 21,781.65, 32,672.67 and 7,741.92

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Solution

The fourth proportional to 21,781.65, 32,672.67 and 7,741.92 is: 11,612.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,781.65 : 32,672.67 = 7,741.92 : x
  2. Step 2: Convert to fraction form
    21,781.65/32,672.67 = 7,741.92/x
  3. Step 3: Cross multiply
    21,781.65x = 32,672.67 × 7,741.92
  4. Step 4: Simplify right side
    21,781.65x = 252,949,197.33
  5. Step 5: Solve for x
    x = 252,949,197.33/21,781.65
  6. Step 6: Final answer
    x = 11,612.95

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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.