Home / 13,391.10-18,481.50-8,360.46

Finding the Fourth Proportional to 13,391.10, 18,481.50 and 8,360.46

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Solution

The fourth proportional to 13,391.10, 18,481.50 and 8,360.46 is: 11,538.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,391.10 : 18,481.50 = 8,360.46 : x
  2. Step 2: Convert to fraction form
    13,391.10/18,481.50 = 8,360.46/x
  3. Step 3: Cross multiply
    13,391.10x = 18,481.50 × 8,360.46
  4. Step 4: Simplify right side
    13,391.10x = 154,513,841.49
  5. Step 5: Solve for x
    x = 154,513,841.49/13,391.10
  6. Step 6: Final answer
    x = 11,538.55

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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.