Home / 21,209.25-29,269.98-11,778.42

Finding the Fourth Proportional to 21,209.25, 29,269.98 and 11,778.42

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Solution

The fourth proportional to 21,209.25, 29,269.98 and 11,778.42 is: 16,254.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,209.25 : 29,269.98 = 11,778.42 : x
  2. Step 2: Convert to fraction form
    21,209.25/29,269.98 = 11,778.42/x
  3. Step 3: Cross multiply
    21,209.25x = 29,269.98 × 11,778.42
  4. Step 4: Simplify right side
    21,209.25x = 344,754,117.83
  5. Step 5: Solve for x
    x = 344,754,117.83/21,209.25
  6. Step 6: Final answer
    x = 16,254.89

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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.