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Finding the Fourth Proportional to 12,200.55, 18,300.83 and 8,312.55

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Solution

The fourth proportional to 12,200.55, 18,300.83 and 8,312.55 is: 12,468.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,200.55 : 18,300.83 = 8,312.55 : x
  2. Step 2: Convert to fraction form
    12,200.55/18,300.83 = 8,312.55/x
  3. Step 3: Cross multiply
    12,200.55x = 18,300.83 × 8,312.55
  4. Step 4: Simplify right side
    12,200.55x = 152,126,522.85
  5. Step 5: Solve for x
    x = 152,126,522.85/12,200.55
  6. Step 6: Final answer
    x = 12,468.83

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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.