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Finding the Fourth Proportional to 13,518.28, 20,228.08 and 7,974.28

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Solution

The fourth proportional to 13,518.28, 20,228.08 and 7,974.28 is: 11,932.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,518.28 : 20,228.08 = 7,974.28 : x
  2. Step 2: Convert to fraction form
    13,518.28/20,228.08 = 7,974.28/x
  3. Step 3: Cross multiply
    13,518.28x = 20,228.08 × 7,974.28
  4. Step 4: Simplify right side
    13,518.28x = 161,304,373.78
  5. Step 5: Solve for x
    x = 161,304,373.78/13,518.28
  6. Step 6: Final answer
    x = 11,932.31

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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.