Home / 28,512.35-42,765.78-8,785.61

Finding the Fourth Proportional to 28,512.35, 42,765.78 and 8,785.61

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Solution

The fourth proportional to 28,512.35, 42,765.78 and 8,785.61 is: 13,177.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,512.35 : 42,765.78 = 8,785.61 : x
  2. Step 2: Convert to fraction form
    28,512.35/42,765.78 = 8,785.61/x
  3. Step 3: Cross multiply
    28,512.35x = 42,765.78 × 8,785.61
  4. Step 4: Simplify right side
    28,512.35x = 375,723,250.60
  5. Step 5: Solve for x
    x = 375,723,250.60/28,512.35
  6. Step 6: Final answer
    x = 13,177.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.