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Finding the Fourth Proportional to 8,891.67, 12,270.60 and 4,912.68

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Solution

The fourth proportional to 8,891.67, 12,270.60 and 4,912.68 is: 6,779.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,891.67 : 12,270.60 = 4,912.68 : x
  2. Step 2: Convert to fraction form
    8,891.67/12,270.60 = 4,912.68/x
  3. Step 3: Cross multiply
    8,891.67x = 12,270.60 × 4,912.68
  4. Step 4: Simplify right side
    8,891.67x = 60,281,531.21
  5. Step 5: Solve for x
    x = 60,281,531.21/8,891.67
  6. Step 6: Final answer
    x = 6,779.55

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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.