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Finding the Fourth Proportional to 8,912.85, 13,293.90 and 8,398.91

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Solution

The fourth proportional to 8,912.85, 13,293.90 and 8,398.91 is: 12,527.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,912.85 : 13,293.90 = 8,398.91 : x
  2. Step 2: Convert to fraction form
    8,912.85/13,293.90 = 8,398.91/x
  3. Step 3: Cross multiply
    8,912.85x = 13,293.90 × 8,398.91
  4. Step 4: Simplify right side
    8,912.85x = 111,654,269.65
  5. Step 5: Solve for x
    x = 111,654,269.65/8,912.85
  6. Step 6: Final answer
    x = 12,527.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.