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Finding the Fourth Proportional to 12,251.52, 18,368.64 and 7,320.96

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Solution

The fourth proportional to 12,251.52, 18,368.64 and 7,320.96 is: 10,976.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,251.52 : 18,368.64 = 7,320.96 : x
  2. Step 2: Convert to fraction form
    12,251.52/18,368.64 = 7,320.96/x
  3. Step 3: Cross multiply
    12,251.52x = 18,368.64 × 7,320.96
  4. Step 4: Simplify right side
    12,251.52x = 134,476,078.69
  5. Step 5: Solve for x
    x = 134,476,078.69/12,251.52
  6. Step 6: Final answer
    x = 10,976.28

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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.