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Finding the Fourth Proportional to 8,287.67, 12,431.21 and 2,740.88

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Solution

The fourth proportional to 8,287.67, 12,431.21 and 2,740.88 is: 4,111.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,287.67 : 12,431.21 = 2,740.88 : x
  2. Step 2: Convert to fraction form
    8,287.67/12,431.21 = 2,740.88/x
  3. Step 3: Cross multiply
    8,287.67x = 12,431.21 × 2,740.88
  4. Step 4: Simplify right side
    8,287.67x = 34,072,379.00
  5. Step 5: Solve for x
    x = 34,072,379.00/8,287.67
  6. Step 6: Final answer
    x = 4,111.22

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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.