Home / 12,213.12-18,319.68-9,778.26

Finding the Fourth Proportional to 12,213.12, 18,319.68 and 9,778.26

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Solution

The fourth proportional to 12,213.12, 18,319.68 and 9,778.26 is: 14,667.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,213.12 : 18,319.68 = 9,778.26 : x
  2. Step 2: Convert to fraction form
    12,213.12/18,319.68 = 9,778.26/x
  3. Step 3: Cross multiply
    12,213.12x = 18,319.68 × 9,778.26
  4. Step 4: Simplify right side
    12,213.12x = 179,134,594.16
  5. Step 5: Solve for x
    x = 179,134,594.16/12,213.12
  6. Step 6: Final answer
    x = 14,667.39

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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.