Home / 10,986.20-16,479.26-2,778.20

Finding the Fourth Proportional to 10,986.20, 16,479.26 and 2,778.20

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Solution

The fourth proportional to 10,986.20, 16,479.26 and 2,778.20 is: 4,167.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,986.20 : 16,479.26 = 2,778.20 : x
  2. Step 2: Convert to fraction form
    10,986.20/16,479.26 = 2,778.20/x
  3. Step 3: Cross multiply
    10,986.20x = 16,479.26 × 2,778.20
  4. Step 4: Simplify right side
    10,986.20x = 45,782,680.13
  5. Step 5: Solve for x
    x = 45,782,680.13/10,986.20
  6. Step 6: Final answer
    x = 4,167.29

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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.