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Finding the Fourth Proportional to 12,662.28, 17,472.78 and 7,938.36

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Solution

The fourth proportional to 12,662.28, 17,472.78 and 7,938.36 is: 10,954.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,662.28 : 17,472.78 = 7,938.36 : x
  2. Step 2: Convert to fraction form
    12,662.28/17,472.78 = 7,938.36/x
  3. Step 3: Cross multiply
    12,662.28x = 17,472.78 × 7,938.36
  4. Step 4: Simplify right side
    12,662.28x = 138,705,217.84
  5. Step 5: Solve for x
    x = 138,705,217.84/12,662.28
  6. Step 6: Final answer
    x = 10,954.21

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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.