Home / 8,891.20-12,270.48-5,115.60

Finding the Fourth Proportional to 8,891.20, 12,270.48 and 5,115.60

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Solution

The fourth proportional to 8,891.20, 12,270.48 and 5,115.60 is: 7,059.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,891.20 : 12,270.48 = 5,115.60 : x
  2. Step 2: Convert to fraction form
    8,891.20/12,270.48 = 5,115.60/x
  3. Step 3: Cross multiply
    8,891.20x = 12,270.48 × 5,115.60
  4. Step 4: Simplify right side
    8,891.20x = 62,770,867.49
  5. Step 5: Solve for x
    x = 62,770,867.49/8,891.20
  6. Step 6: Final answer
    x = 7,059.89

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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.