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Finding the Fourth Proportional to 21,773.72, 32,679.54 and 12,432.44

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Solution

The fourth proportional to 21,773.72, 32,679.54 and 12,432.44 is: 18,659.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,773.72 : 32,679.54 = 12,432.44 : x
  2. Step 2: Convert to fraction form
    21,773.72/32,679.54 = 12,432.44/x
  3. Step 3: Cross multiply
    21,773.72x = 32,679.54 × 12,432.44
  4. Step 4: Simplify right side
    21,773.72x = 406,286,420.28
  5. Step 5: Solve for x
    x = 406,286,420.28/21,773.72
  6. Step 6: Final answer
    x = 18,659.49

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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.