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Finding the Fourth Proportional to 17,120.85, 25,680.92 and 7,886.85

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Solution

The fourth proportional to 17,120.85, 25,680.92 and 7,886.85 is: 11,830.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,120.85 : 25,680.92 = 7,886.85 : x
  2. Step 2: Convert to fraction form
    17,120.85/25,680.92 = 7,886.85/x
  3. Step 3: Cross multiply
    17,120.85x = 25,680.92 × 7,886.85
  4. Step 4: Simplify right side
    17,120.85x = 202,541,524.47
  5. Step 5: Solve for x
    x = 202,541,524.47/17,120.85
  6. Step 6: Final answer
    x = 11,830.11

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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.