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Finding the Fourth Proportional to 8,645.49, 11,930.49 and 5,108.63

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Solution

The fourth proportional to 8,645.49, 11,930.49 and 5,108.63 is: 7,049.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,645.49 : 11,930.49 = 5,108.63 : x
  2. Step 2: Convert to fraction form
    8,645.49/11,930.49 = 5,108.63/x
  3. Step 3: Cross multiply
    8,645.49x = 11,930.49 × 5,108.63
  4. Step 4: Simplify right side
    8,645.49x = 60,948,399.48
  5. Step 5: Solve for x
    x = 60,948,399.48/8,645.49
  6. Step 6: Final answer
    x = 7,049.73

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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.