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Finding the Fourth Proportional to 8,313.68, 12,472.68 and 3,121.04

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Solution

The fourth proportional to 8,313.68, 12,472.68 and 3,121.04 is: 4,682.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,313.68 : 12,472.68 = 3,121.04 : x
  2. Step 2: Convert to fraction form
    8,313.68/12,472.68 = 3,121.04/x
  3. Step 3: Cross multiply
    8,313.68x = 12,472.68 × 3,121.04
  4. Step 4: Simplify right side
    8,313.68x = 38,927,733.19
  5. Step 5: Solve for x
    x = 38,927,733.19/8,313.68
  6. Step 6: Final answer
    x = 4,682.37

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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.