Home / 21,287.54-29,377.71-11,856.09

Finding the Fourth Proportional to 21,287.54, 29,377.71 and 11,856.09

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Solution

The fourth proportional to 21,287.54, 29,377.71 and 11,856.09 is: 16,361.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.54 : 29,377.71 = 11,856.09 : x
  2. Step 2: Convert to fraction form
    21,287.54/29,377.71 = 11,856.09/x
  3. Step 3: Cross multiply
    21,287.54x = 29,377.71 × 11,856.09
  4. Step 4: Simplify right side
    21,287.54x = 348,304,773.75
  5. Step 5: Solve for x
    x = 348,304,773.75/21,287.54
  6. Step 6: Final answer
    x = 16,361.91

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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.