Home / 13,517.78-18,651.20-8,212.28

Finding the Fourth Proportional to 13,517.78, 18,651.20 and 8,212.28

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Solution

The fourth proportional to 13,517.78, 18,651.20 and 8,212.28 is: 11,330.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,517.78 : 18,651.20 = 8,212.28 : x
  2. Step 2: Convert to fraction form
    13,517.78/18,651.20 = 8,212.28/x
  3. Step 3: Cross multiply
    13,517.78x = 18,651.20 × 8,212.28
  4. Step 4: Simplify right side
    13,517.78x = 153,168,876.74
  5. Step 5: Solve for x
    x = 153,168,876.74/13,517.78
  6. Step 6: Final answer
    x = 11,330.92

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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.