Home / 13,290.11-18,340.13-7,321.79

Finding the Fourth Proportional to 13,290.11, 18,340.13 and 7,321.79

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Solution

The fourth proportional to 13,290.11, 18,340.13 and 7,321.79 is: 10,103.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.11 : 18,340.13 = 7,321.79 : x
  2. Step 2: Convert to fraction form
    13,290.11/18,340.13 = 7,321.79/x
  3. Step 3: Cross multiply
    13,290.11x = 18,340.13 × 7,321.79
  4. Step 4: Simplify right side
    13,290.11x = 134,282,452.12
  5. Step 5: Solve for x
    x = 134,282,452.12/13,290.11
  6. Step 6: Final answer
    x = 10,103.94

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Double scale
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Similar ratio
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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.