Home / 12,939.28-17,845.92-8,397

Finding the Fourth Proportional to 12,939.28, 17,845.92 and 8,397

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Solution

The fourth proportional to 12,939.28, 17,845.92 and 8,397 is: 11,581.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.28 : 17,845.92 = 8,397 : x
  2. Step 2: Convert to fraction form
    12,939.28/17,845.92 = 8,397/x
  3. Step 3: Cross multiply
    12,939.28x = 17,845.92 × 8,397
  4. Step 4: Simplify right side
    12,939.28x = 149,852,190.24
  5. Step 5: Solve for x
    x = 149,852,190.24/12,939.28
  6. Step 6: Final answer
    x = 11,581.19

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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.