Home / 21,257.90-29,376.36-15,943.49

Finding the Fourth Proportional to 21,257.90, 29,376.36 and 15,943.49

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Solution

The fourth proportional to 21,257.90, 29,376.36 and 15,943.49 is: 22,032.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,257.90 : 29,376.36 = 15,943.49 : x
  2. Step 2: Convert to fraction form
    21,257.90/29,376.36 = 15,943.49/x
  3. Step 3: Cross multiply
    21,257.90x = 29,376.36 × 15,943.49
  4. Step 4: Simplify right side
    21,257.90x = 468,361,580.20
  5. Step 5: Solve for x
    x = 468,361,580.20/21,257.90
  6. Step 6: Final answer
    x = 22,032.36

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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.