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Finding the Fourth Proportional to 21,645.92, 29,877.84 and 12,695.84

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Solution

The fourth proportional to 21,645.92, 29,877.84 and 12,695.84 is: 17,524.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,645.92 : 29,877.84 = 12,695.84 : x
  2. Step 2: Convert to fraction form
    21,645.92/29,877.84 = 12,695.84/x
  3. Step 3: Cross multiply
    21,645.92x = 29,877.84 × 12,695.84
  4. Step 4: Simplify right side
    21,645.92x = 379,324,276.19
  5. Step 5: Solve for x
    x = 379,324,276.19/21,645.92
  6. Step 6: Final answer
    x = 17,524.05

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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.