Home / 12,431.94-17,158.38-7,126.80

Finding the Fourth Proportional to 12,431.94, 17,158.38 and 7,126.80

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Solution

The fourth proportional to 12,431.94, 17,158.38 and 7,126.80 is: 9,836.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,431.94 : 17,158.38 = 7,126.80 : x
  2. Step 2: Convert to fraction form
    12,431.94/17,158.38 = 7,126.80/x
  3. Step 3: Cross multiply
    12,431.94x = 17,158.38 × 7,126.80
  4. Step 4: Simplify right side
    12,431.94x = 122,284,342.58
  5. Step 5: Solve for x
    x = 122,284,342.58/12,431.94
  6. Step 6: Final answer
    x = 9,836.30

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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.