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Finding the Fourth Proportional to 21,685.96, 32,520.78 and 8,531.14

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Solution

The fourth proportional to 21,685.96, 32,520.78 and 8,531.14 is: 12,793.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,685.96 : 32,520.78 = 8,531.14 : x
  2. Step 2: Convert to fraction form
    21,685.96/32,520.78 = 8,531.14/x
  3. Step 3: Cross multiply
    21,685.96x = 32,520.78 × 8,531.14
  4. Step 4: Simplify right side
    21,685.96x = 277,439,327.09
  5. Step 5: Solve for x
    x = 277,439,327.09/21,685.96
  6. Step 6: Final answer
    x = 12,793.50

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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.