Home / 13,314.11-18,370.19-8,138.67

Finding the Fourth Proportional to 13,314.11, 18,370.19 and 8,138.67

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Solution

The fourth proportional to 13,314.11, 18,370.19 and 8,138.67 is: 11,229.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,314.11 : 18,370.19 = 8,138.67 : x
  2. Step 2: Convert to fraction form
    13,314.11/18,370.19 = 8,138.67/x
  3. Step 3: Cross multiply
    13,314.11x = 18,370.19 × 8,138.67
  4. Step 4: Simplify right side
    13,314.11x = 149,508,873.55
  5. Step 5: Solve for x
    x = 149,508,873.55/13,314.11
  6. Step 6: Final answer
    x = 11,229.36

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Double scale
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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.