Home / 21,536.78-29,721.21-12,591.14

Finding the Fourth Proportional to 21,536.78, 29,721.21 and 12,591.14

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Solution

The fourth proportional to 21,536.78, 29,721.21 and 12,591.14 is: 17,376.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,536.78 : 29,721.21 = 12,591.14 : x
  2. Step 2: Convert to fraction form
    21,536.78/29,721.21 = 12,591.14/x
  3. Step 3: Cross multiply
    21,536.78x = 29,721.21 × 12,591.14
  4. Step 4: Simplify right side
    21,536.78x = 374,223,916.08
  5. Step 5: Solve for x
    x = 374,223,916.08/21,536.78
  6. Step 6: Final answer
    x = 17,376.04

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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.