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Finding the Fourth Proportional to 12,205.60, 18,311.10 and 5,630.20

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Solution

The fourth proportional to 12,205.60, 18,311.10 and 5,630.20 is: 8,446.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,205.60 : 18,311.10 = 5,630.20 : x
  2. Step 2: Convert to fraction form
    12,205.60/18,311.10 = 5,630.20/x
  3. Step 3: Cross multiply
    12,205.60x = 18,311.10 × 5,630.20
  4. Step 4: Simplify right side
    12,205.60x = 103,095,155.22
  5. Step 5: Solve for x
    x = 103,095,155.22/12,205.60
  6. Step 6: Final answer
    x = 8,446.55

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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.