Home / 12,138.30-18,207.45-5,577.30

Finding the Fourth Proportional to 12,138.30, 18,207.45 and 5,577.30

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Solution

The fourth proportional to 12,138.30, 18,207.45 and 5,577.30 is: 8,365.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.30 : 18,207.45 = 5,577.30 : x
  2. Step 2: Convert to fraction form
    12,138.30/18,207.45 = 5,577.30/x
  3. Step 3: Cross multiply
    12,138.30x = 18,207.45 × 5,577.30
  4. Step 4: Simplify right side
    12,138.30x = 101,548,410.89
  5. Step 5: Solve for x
    x = 101,548,410.89/12,138.30
  6. Step 6: Final answer
    x = 8,365.95

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.