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Finding the Fourth Proportional to 12,207.88, 18,311.68 and 2,973.88

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Solution

The fourth proportional to 12,207.88, 18,311.68 and 2,973.88 is: 4,460.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,207.88 : 18,311.68 = 2,973.88 : x
  2. Step 2: Convert to fraction form
    12,207.88/18,311.68 = 2,973.88/x
  3. Step 3: Cross multiply
    12,207.88x = 18,311.68 × 2,973.88
  4. Step 4: Simplify right side
    12,207.88x = 54,456,738.92
  5. Step 5: Solve for x
    x = 54,456,738.92/12,207.88
  6. Step 6: Final answer
    x = 4,460.79

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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.