Home / 21,209.50-29,269.11-11,778.13

Finding the Fourth Proportional to 21,209.50, 29,269.11 and 11,778.13

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Solution

The fourth proportional to 21,209.50, 29,269.11 and 11,778.13 is: 16,253.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,209.50 : 29,269.11 = 11,778.13 : x
  2. Step 2: Convert to fraction form
    21,209.50/29,269.11 = 11,778.13/x
  3. Step 3: Cross multiply
    21,209.50x = 29,269.11 × 11,778.13
  4. Step 4: Simplify right side
    21,209.50x = 344,735,382.56
  5. Step 5: Solve for x
    x = 344,735,382.56/21,209.50
  6. Step 6: Final answer
    x = 16,253.82

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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.