Home / 21,669.30-29,882.31-13,172.58

Finding the Fourth Proportional to 21,669.30, 29,882.31 and 13,172.58

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Solution

The fourth proportional to 21,669.30, 29,882.31 and 13,172.58 is: 18,165.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,669.30 : 29,882.31 = 13,172.58 : x
  2. Step 2: Convert to fraction form
    21,669.30/29,882.31 = 13,172.58/x
  3. Step 3: Cross multiply
    21,669.30x = 29,882.31 × 13,172.58
  4. Step 4: Simplify right side
    21,669.30x = 393,627,119.06
  5. Step 5: Solve for x
    x = 393,627,119.06/21,669.30
  6. Step 6: Final answer
    x = 18,165.20

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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.