Home / 21,390.38-29,517.50-11,829.69

Finding the Fourth Proportional to 21,390.38, 29,517.50 and 11,829.69

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Solution

The fourth proportional to 21,390.38, 29,517.50 and 11,829.69 is: 16,324.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.38 : 29,517.50 = 11,829.69 : x
  2. Step 2: Convert to fraction form
    21,390.38/29,517.50 = 11,829.69/x
  3. Step 3: Cross multiply
    21,390.38x = 29,517.50 × 11,829.69
  4. Step 4: Simplify right side
    21,390.38x = 349,182,815.43
  5. Step 5: Solve for x
    x = 349,182,815.43/21,390.38
  6. Step 6: Final answer
    x = 16,324.30

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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.