Home / 13,436.72-18,537.76-8,129.60

Finding the Fourth Proportional to 13,436.72, 18,537.76 and 8,129.60

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Solution

The fourth proportional to 13,436.72, 18,537.76 and 8,129.60 is: 11,215.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,436.72 : 18,537.76 = 8,129.60 : x
  2. Step 2: Convert to fraction form
    13,436.72/18,537.76 = 8,129.60/x
  3. Step 3: Cross multiply
    13,436.72x = 18,537.76 × 8,129.60
  4. Step 4: Simplify right side
    13,436.72x = 150,704,573.70
  5. Step 5: Solve for x
    x = 150,704,573.70/13,436.72
  6. Step 6: Final answer
    x = 11,215.88

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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.