Home / 8,129.56-11,217.72-5,140.12

Finding the Fourth Proportional to 8,129.56, 11,217.72 and 5,140.12

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Solution

The fourth proportional to 8,129.56, 11,217.72 and 5,140.12 is: 7,092.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,129.56 : 11,217.72 = 5,140.12 : x
  2. Step 2: Convert to fraction form
    8,129.56/11,217.72 = 5,140.12/x
  3. Step 3: Cross multiply
    8,129.56x = 11,217.72 × 5,140.12
  4. Step 4: Simplify right side
    8,129.56x = 57,660,426.93
  5. Step 5: Solve for x
    x = 57,660,426.93/8,129.56
  6. Step 6: Final answer
    x = 7,092.69

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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.