Home / 12,738.75-17,581.14-7,149.75

Finding the Fourth Proportional to 12,738.75, 17,581.14 and 7,149.75

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Solution

The fourth proportional to 12,738.75, 17,581.14 and 7,149.75 is: 9,867.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,738.75 : 17,581.14 = 7,149.75 : x
  2. Step 2: Convert to fraction form
    12,738.75/17,581.14 = 7,149.75/x
  3. Step 3: Cross multiply
    12,738.75x = 17,581.14 × 7,149.75
  4. Step 4: Simplify right side
    12,738.75x = 125,700,755.72
  5. Step 5: Solve for x
    x = 125,700,755.72/12,738.75
  6. Step 6: Final answer
    x = 9,867.59

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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.