Home / 21,101.12-29,122.31-12,149

Finding the Fourth Proportional to 21,101.12, 29,122.31 and 12,149

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Solution

The fourth proportional to 21,101.12, 29,122.31 and 12,149 is: 16,767.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,101.12 : 29,122.31 = 12,149 : x
  2. Step 2: Convert to fraction form
    21,101.12/29,122.31 = 12,149/x
  3. Step 3: Cross multiply
    21,101.12x = 29,122.31 × 12,149
  4. Step 4: Simplify right side
    21,101.12x = 353,806,944.19
  5. Step 5: Solve for x
    x = 353,806,944.19/21,101.12
  6. Step 6: Final answer
    x = 16,767.21

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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.