Home / 12,431.07-17,146.14-8,180.78

Finding the Fourth Proportional to 12,431.07, 17,146.14 and 8,180.78

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Solution

The fourth proportional to 12,431.07, 17,146.14 and 8,180.78 is: 11,283.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,431.07 : 17,146.14 = 8,180.78 : x
  2. Step 2: Convert to fraction form
    12,431.07/17,146.14 = 8,180.78/x
  3. Step 3: Cross multiply
    12,431.07x = 17,146.14 × 8,180.78
  4. Step 4: Simplify right side
    12,431.07x = 140,268,713.46
  5. Step 5: Solve for x
    x = 140,268,713.46/12,431.07
  6. Step 6: Final answer
    x = 11,283.72

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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.