Home / 15,195.20-20,969.55-8,480.70

Finding the Fourth Proportional to 15,195.20, 20,969.55 and 8,480.70

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Solution

The fourth proportional to 15,195.20, 20,969.55 and 8,480.70 is: 11,703.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,195.20 : 20,969.55 = 8,480.70 : x
  2. Step 2: Convert to fraction form
    15,195.20/20,969.55 = 8,480.70/x
  3. Step 3: Cross multiply
    15,195.20x = 20,969.55 × 8,480.70
  4. Step 4: Simplify right side
    15,195.20x = 177,836,462.69
  5. Step 5: Solve for x
    x = 177,836,462.69/15,195.20
  6. Step 6: Final answer
    x = 11,703.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.