Home / 13,290.01-18,340.11-7,321.55

Finding the Fourth Proportional to 13,290.01, 18,340.11 and 7,321.55

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Solution

The fourth proportional to 13,290.01, 18,340.11 and 7,321.55 is: 10,103.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.01 : 18,340.11 = 7,321.55 : x
  2. Step 2: Convert to fraction form
    13,290.01/18,340.11 = 7,321.55/x
  3. Step 3: Cross multiply
    13,290.01x = 18,340.11 × 7,321.55
  4. Step 4: Simplify right side
    13,290.01x = 134,277,940.67
  5. Step 5: Solve for x
    x = 134,277,940.67/13,290.01
  6. Step 6: Final answer
    x = 10,103.68

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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.