Home / 21,099.88-29,116.65-11,537.87

Finding the Fourth Proportional to 21,099.88, 29,116.65 and 11,537.87

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Solution

The fourth proportional to 21,099.88, 29,116.65 and 11,537.87 is: 15,921.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,099.88 : 29,116.65 = 11,537.87 : x
  2. Step 2: Convert to fraction form
    21,099.88/29,116.65 = 11,537.87/x
  3. Step 3: Cross multiply
    21,099.88x = 29,116.65 × 11,537.87
  4. Step 4: Simplify right side
    21,099.88x = 335,943,976.95
  5. Step 5: Solve for x
    x = 335,943,976.95/21,099.88
  6. Step 6: Final answer
    x = 15,921.61

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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.