Home / 21,669.76-29,906.10-12,240.04

Finding the Fourth Proportional to 21,669.76, 29,906.10 and 12,240.04

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Solution

The fourth proportional to 21,669.76, 29,906.10 and 12,240.04 is: 16,892.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,669.76 : 29,906.10 = 12,240.04 : x
  2. Step 2: Convert to fraction form
    21,669.76/29,906.10 = 12,240.04/x
  3. Step 3: Cross multiply
    21,669.76x = 29,906.10 × 12,240.04
  4. Step 4: Simplify right side
    21,669.76x = 366,051,860.24
  5. Step 5: Solve for x
    x = 366,051,860.24/21,669.76
  6. Step 6: Final answer
    x = 16,892.29

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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.