Home / 21,136.56-29,141.92-13,569.52

Finding the Fourth Proportional to 21,136.56, 29,141.92 and 13,569.52

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Solution

The fourth proportional to 21,136.56, 29,141.92 and 13,569.52 is: 18,708.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,136.56 : 29,141.92 = 13,569.52 : x
  2. Step 2: Convert to fraction form
    21,136.56/29,141.92 = 13,569.52/x
  3. Step 3: Cross multiply
    21,136.56x = 29,141.92 × 13,569.52
  4. Step 4: Simplify right side
    21,136.56x = 395,441,866.28
  5. Step 5: Solve for x
    x = 395,441,866.28/21,136.56
  6. Step 6: Final answer
    x = 18,708.90

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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.