Home / 12,439.75-17,181.44-8,240.71

Finding the Fourth Proportional to 12,439.75, 17,181.44 and 8,240.71

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Solution

The fourth proportional to 12,439.75, 17,181.44 and 8,240.71 is: 11,381.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,439.75 : 17,181.44 = 8,240.71 : x
  2. Step 2: Convert to fraction form
    12,439.75/17,181.44 = 8,240.71/x
  3. Step 3: Cross multiply
    12,439.75x = 17,181.44 × 8,240.71
  4. Step 4: Simplify right side
    12,439.75x = 141,587,264.42
  5. Step 5: Solve for x
    x = 141,587,264.42/12,439.75
  6. Step 6: Final answer
    x = 11,381.84

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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.