Home / 13,290.12-18,340.14-7,321.77

Finding the Fourth Proportional to 13,290.12, 18,340.14 and 7,321.77

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Solution

The fourth proportional to 13,290.12, 18,340.14 and 7,321.77 is: 10,103.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.12 : 18,340.14 = 7,321.77 : x
  2. Step 2: Convert to fraction form
    13,290.12/18,340.14 = 7,321.77/x
  3. Step 3: Cross multiply
    13,290.12x = 18,340.14 × 7,321.77
  4. Step 4: Simplify right side
    13,290.12x = 134,282,286.85
  5. Step 5: Solve for x
    x = 134,282,286.85/13,290.12
  6. Step 6: Final answer
    x = 10,103.92

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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.