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Finding the Fourth Proportional to 12,882.60, 17,811.06 and 9,908.28

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Solution

The fourth proportional to 12,882.60, 17,811.06 and 9,908.28 is: 13,698.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,882.60 : 17,811.06 = 9,908.28 : x
  2. Step 2: Convert to fraction form
    12,882.60/17,811.06 = 9,908.28/x
  3. Step 3: Cross multiply
    12,882.60x = 17,811.06 × 9,908.28
  4. Step 4: Simplify right side
    12,882.60x = 176,476,969.58
  5. Step 5: Solve for x
    x = 176,476,969.58/12,882.60
  6. Step 6: Final answer
    x = 13,698.86

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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.