Home / 21,119.31-29,144.34-11,558.97

Finding the Fourth Proportional to 21,119.31, 29,144.34 and 11,558.97

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Solution

The fourth proportional to 21,119.31, 29,144.34 and 11,558.97 is: 15,951.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,119.31 : 29,144.34 = 11,558.97 : x
  2. Step 2: Convert to fraction form
    21,119.31/29,144.34 = 11,558.97/x
  3. Step 3: Cross multiply
    21,119.31x = 29,144.34 × 11,558.97
  4. Step 4: Simplify right side
    21,119.31x = 336,878,551.73
  5. Step 5: Solve for x
    x = 336,878,551.73/21,119.31
  6. Step 6: Final answer
    x = 15,951.21

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Double scale
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1.5x scale

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.