Home / 10,919.20-16,374.48-3,989.92

Finding the Fourth Proportional to 10,919.20, 16,374.48 and 3,989.92

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Solution

The fourth proportional to 10,919.20, 16,374.48 and 3,989.92 is: 5,983.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,919.20 : 16,374.48 = 3,989.92 : x
  2. Step 2: Convert to fraction form
    10,919.20/16,374.48 = 3,989.92/x
  3. Step 3: Cross multiply
    10,919.20x = 16,374.48 × 3,989.92
  4. Step 4: Simplify right side
    10,919.20x = 65,332,865.24
  5. Step 5: Solve for x
    x = 65,332,865.24/10,919.20
  6. Step 6: Final answer
    x = 5,983.30

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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.