Home / 12,220.20-18,330.30-8,461.80

Finding the Fourth Proportional to 12,220.20, 18,330.30 and 8,461.80

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Solution

The fourth proportional to 12,220.20, 18,330.30 and 8,461.80 is: 12,692.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,220.20 : 18,330.30 = 8,461.80 : x
  2. Step 2: Convert to fraction form
    12,220.20/18,330.30 = 8,461.80/x
  3. Step 3: Cross multiply
    12,220.20x = 18,330.30 × 8,461.80
  4. Step 4: Simplify right side
    12,220.20x = 155,107,332.54
  5. Step 5: Solve for x
    x = 155,107,332.54/12,220.20
  6. Step 6: Final answer
    x = 12,692.70

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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.