Home / 12,439.50-17,181.09-8,240.46

Finding the Fourth Proportional to 12,439.50, 17,181.09 and 8,240.46

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Solution

The fourth proportional to 12,439.50, 17,181.09 and 8,240.46 is: 11,381.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,439.50 : 17,181.09 = 8,240.46 : x
  2. Step 2: Convert to fraction form
    12,439.50/17,181.09 = 8,240.46/x
  3. Step 3: Cross multiply
    12,439.50x = 17,181.09 × 8,240.46
  4. Step 4: Simplify right side
    12,439.50x = 141,580,084.90
  5. Step 5: Solve for x
    x = 141,580,084.90/12,439.50
  6. Step 6: Final answer
    x = 11,381.49

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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.