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Finding the Fourth Proportional to 15,175.96, 20,930.96 and 9,872.48

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Solution

The fourth proportional to 15,175.96, 20,930.96 and 9,872.48 is: 13,616.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,175.96 : 20,930.96 = 9,872.48 : x
  2. Step 2: Convert to fraction form
    15,175.96/20,930.96 = 9,872.48/x
  3. Step 3: Cross multiply
    15,175.96x = 20,930.96 × 9,872.48
  4. Step 4: Simplify right side
    15,175.96x = 206,640,483.98
  5. Step 5: Solve for x
    x = 206,640,483.98/15,175.96
  6. Step 6: Final answer
    x = 13,616.30

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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.