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Finding the Fourth Proportional to 8,312.85, 12,481.43 and 5,039.64

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Solution

The fourth proportional to 8,312.85, 12,481.43 and 5,039.64 is: 7,566.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,312.85 : 12,481.43 = 5,039.64 : x
  2. Step 2: Convert to fraction form
    8,312.85/12,481.43 = 5,039.64/x
  3. Step 3: Cross multiply
    8,312.85x = 12,481.43 × 5,039.64
  4. Step 4: Simplify right side
    8,312.85x = 62,901,888.69
  5. Step 5: Solve for x
    x = 62,901,888.69/8,312.85
  6. Step 6: Final answer
    x = 7,566.83

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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.