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Finding the Fourth Proportional to 21,456.96, 29,608.96 and 12,023.70

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Solution

The fourth proportional to 21,456.96, 29,608.96 and 12,023.70 is: 16,591.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,456.96 : 29,608.96 = 12,023.70 : x
  2. Step 2: Convert to fraction form
    21,456.96/29,608.96 = 12,023.70/x
  3. Step 3: Cross multiply
    21,456.96x = 29,608.96 × 12,023.70
  4. Step 4: Simplify right side
    21,456.96x = 356,009,252.35
  5. Step 5: Solve for x
    x = 356,009,252.35/21,456.96
  6. Step 6: Final answer
    x = 16,591.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.