Home / 10,919.20-16,378.80-2,711.20

Finding the Fourth Proportional to 10,919.20, 16,378.80 and 2,711.20

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Solution

The fourth proportional to 10,919.20, 16,378.80 and 2,711.20 is: 4,066.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,919.20 : 16,378.80 = 2,711.20 : x
  2. Step 2: Convert to fraction form
    10,919.20/16,378.80 = 2,711.20/x
  3. Step 3: Cross multiply
    10,919.20x = 16,378.80 × 2,711.20
  4. Step 4: Simplify right side
    10,919.20x = 44,406,202.56
  5. Step 5: Solve for x
    x = 44,406,202.56/10,919.20
  6. Step 6: Final answer
    x = 4,066.80

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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.