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Finding the Fourth Proportional to 12,955.14, 17,882.64 and 7,922.88

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Solution

The fourth proportional to 12,955.14, 17,882.64 and 7,922.88 is: 10,936.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,955.14 : 17,882.64 = 7,922.88 : x
  2. Step 2: Convert to fraction form
    12,955.14/17,882.64 = 7,922.88/x
  3. Step 3: Cross multiply
    12,955.14x = 17,882.64 × 7,922.88
  4. Step 4: Simplify right side
    12,955.14x = 141,682,010.80
  5. Step 5: Solve for x
    x = 141,682,010.80/12,955.14
  6. Step 6: Final answer
    x = 10,936.36

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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.