Home / 12,213.60-18,319.92-8,505.12

Finding the Fourth Proportional to 12,213.60, 18,319.92 and 8,505.12

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Solution

The fourth proportional to 12,213.60, 18,319.92 and 8,505.12 is: 12,757.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,213.60 : 18,319.92 = 8,505.12 : x
  2. Step 2: Convert to fraction form
    12,213.60/18,319.92 = 8,505.12/x
  3. Step 3: Cross multiply
    12,213.60x = 18,319.92 × 8,505.12
  4. Step 4: Simplify right side
    12,213.60x = 155,813,117.99
  5. Step 5: Solve for x
    x = 155,813,117.99/12,213.60
  6. Step 6: Final answer
    x = 12,757.35

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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.