Home / 21,711.15-29,974.86-16,665.72

Finding the Fourth Proportional to 21,711.15, 29,974.86 and 16,665.72

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Solution

The fourth proportional to 21,711.15, 29,974.86 and 16,665.72 is: 23,009.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,711.15 : 29,974.86 = 16,665.72 : x
  2. Step 2: Convert to fraction form
    21,711.15/29,974.86 = 16,665.72/x
  3. Step 3: Cross multiply
    21,711.15x = 29,974.86 × 16,665.72
  4. Step 4: Simplify right side
    21,711.15x = 499,552,623.80
  5. Step 5: Solve for x
    x = 499,552,623.80/21,711.15
  6. Step 6: Final answer
    x = 23,009.04

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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.