Home / 21,556.30-29,747.94-12,124.78

Finding the Fourth Proportional to 21,556.30, 29,747.94 and 12,124.78

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Solution

The fourth proportional to 21,556.30, 29,747.94 and 12,124.78 is: 16,732.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,556.30 : 29,747.94 = 12,124.78 : x
  2. Step 2: Convert to fraction form
    21,556.30/29,747.94 = 12,124.78/x
  3. Step 3: Cross multiply
    21,556.30x = 29,747.94 × 12,124.78
  4. Step 4: Simplify right side
    21,556.30x = 360,687,227.95
  5. Step 5: Solve for x
    x = 360,687,227.95/21,556.30
  6. Step 6: Final answer
    x = 16,732.33

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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.