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Finding the Fourth Proportional to 12,928.62, 17,850.06 and 9,939.18

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Solution

The fourth proportional to 12,928.62, 17,850.06 and 9,939.18 is: 13,722.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,928.62 : 17,850.06 = 9,939.18 : x
  2. Step 2: Convert to fraction form
    12,928.62/17,850.06 = 9,939.18/x
  3. Step 3: Cross multiply
    12,928.62x = 17,850.06 × 9,939.18
  4. Step 4: Simplify right side
    12,928.62x = 177,414,959.35
  5. Step 5: Solve for x
    x = 177,414,959.35/12,928.62
  6. Step 6: Final answer
    x = 13,722.65

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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.