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Finding the Fourth Proportional to 11,917.20, 17,860.68 and 5,343.12

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Solution

The fourth proportional to 11,917.20, 17,860.68 and 5,343.12 is: 8,007.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,917.20 : 17,860.68 = 5,343.12 : x
  2. Step 2: Convert to fraction form
    11,917.20/17,860.68 = 5,343.12/x
  3. Step 3: Cross multiply
    11,917.20x = 17,860.68 × 5,343.12
  4. Step 4: Simplify right side
    11,917.20x = 95,431,756.52
  5. Step 5: Solve for x
    x = 95,431,756.52/11,917.20
  6. Step 6: Final answer
    x = 8,007.90

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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.