Home / 8,856.40-12,221.62-5,081.78

Finding the Fourth Proportional to 8,856.40, 12,221.62 and 5,081.78

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Solution

The fourth proportional to 8,856.40, 12,221.62 and 5,081.78 is: 7,012.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,856.40 : 12,221.62 = 5,081.78 : x
  2. Step 2: Convert to fraction form
    8,856.40/12,221.62 = 5,081.78/x
  3. Step 3: Cross multiply
    8,856.40x = 12,221.62 × 5,081.78
  4. Step 4: Simplify right side
    8,856.40x = 62,107,584.08
  5. Step 5: Solve for x
    x = 62,107,584.08/8,856.40
  6. Step 6: Final answer
    x = 7,012.73

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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.