Home / 13,517.85-20,278.71-4,158.65

Finding the Fourth Proportional to 13,517.85, 20,278.71 and 4,158.65

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Solution

The fourth proportional to 13,517.85, 20,278.71 and 4,158.65 is: 6,238.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,517.85 : 20,278.71 = 4,158.65 : x
  2. Step 2: Convert to fraction form
    13,517.85/20,278.71 = 4,158.65/x
  3. Step 3: Cross multiply
    13,517.85x = 20,278.71 × 4,158.65
  4. Step 4: Simplify right side
    13,517.85x = 84,332,057.34
  5. Step 5: Solve for x
    x = 84,332,057.34/13,517.85
  6. Step 6: Final answer
    x = 6,238.57

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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.