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Finding the Fourth Proportional to 21,683.60, 32,512.20 and 8,520.20

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Solution

The fourth proportional to 21,683.60, 32,512.20 and 8,520.20 is: 12,775.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,683.60 : 32,512.20 = 8,520.20 : x
  2. Step 2: Convert to fraction form
    21,683.60/32,512.20 = 8,520.20/x
  3. Step 3: Cross multiply
    21,683.60x = 32,512.20 × 8,520.20
  4. Step 4: Simplify right side
    21,683.60x = 277,010,446.44
  5. Step 5: Solve for x
    x = 277,010,446.44/21,683.60
  6. Step 6: Final answer
    x = 12,775.11

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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.