Home / 13,217.31-18,243.32-8,178.60

Finding the Fourth Proportional to 13,217.31, 18,243.32 and 8,178.60

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Solution

The fourth proportional to 13,217.31, 18,243.32 and 8,178.60 is: 11,288.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,217.31 : 18,243.32 = 8,178.60 : x
  2. Step 2: Convert to fraction form
    13,217.31/18,243.32 = 8,178.60/x
  3. Step 3: Cross multiply
    13,217.31x = 18,243.32 × 8,178.60
  4. Step 4: Simplify right side
    13,217.31x = 149,204,816.95
  5. Step 5: Solve for x
    x = 149,204,816.95/13,217.31
  6. Step 6: Final answer
    x = 11,288.59

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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.