Home / 21,257.82-29,331.34-12,304.78

Finding the Fourth Proportional to 21,257.82, 29,331.34 and 12,304.78

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Solution

The fourth proportional to 21,257.82, 29,331.34 and 12,304.78 is: 16,978.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,257.82 : 29,331.34 = 12,304.78 : x
  2. Step 2: Convert to fraction form
    21,257.82/29,331.34 = 12,304.78/x
  3. Step 3: Cross multiply
    21,257.82x = 29,331.34 × 12,304.78
  4. Step 4: Simplify right side
    21,257.82x = 360,915,685.81
  5. Step 5: Solve for x
    x = 360,915,685.81/21,257.82
  6. Step 6: Final answer
    x = 16,978.02

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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.