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Finding the Fourth Proportional to 21,630.84, 32,446.26 and 8,489.40

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Solution

The fourth proportional to 21,630.84, 32,446.26 and 8,489.40 is: 12,734.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,630.84 : 32,446.26 = 8,489.40 : x
  2. Step 2: Convert to fraction form
    21,630.84/32,446.26 = 8,489.40/x
  3. Step 3: Cross multiply
    21,630.84x = 32,446.26 × 8,489.40
  4. Step 4: Simplify right side
    21,630.84x = 275,449,279.64
  5. Step 5: Solve for x
    x = 275,449,279.64/21,630.84
  6. Step 6: Final answer
    x = 12,734.10

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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.