Home / 21,246.98-29,321.18-11,687.66

Finding the Fourth Proportional to 21,246.98, 29,321.18 and 11,687.66

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Solution

The fourth proportional to 21,246.98, 29,321.18 and 11,687.66 is: 16,129.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,246.98 : 29,321.18 = 11,687.66 : x
  2. Step 2: Convert to fraction form
    21,246.98/29,321.18 = 11,687.66/x
  3. Step 3: Cross multiply
    21,246.98x = 29,321.18 × 11,687.66
  4. Step 4: Simplify right side
    21,246.98x = 342,695,777.59
  5. Step 5: Solve for x
    x = 342,695,777.59/21,246.98
  6. Step 6: Final answer
    x = 16,129.16

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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.