Home / 12,156.60-18,206.10-8,239.80

Finding the Fourth Proportional to 12,156.60, 18,206.10 and 8,239.80

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Solution

The fourth proportional to 12,156.60, 18,206.10 and 8,239.80 is: 12,340.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,156.60 : 18,206.10 = 8,239.80 : x
  2. Step 2: Convert to fraction form
    12,156.60/18,206.10 = 8,239.80/x
  3. Step 3: Cross multiply
    12,156.60x = 18,206.10 × 8,239.80
  4. Step 4: Simplify right side
    12,156.60x = 150,014,622.78
  5. Step 5: Solve for x
    x = 150,014,622.78/12,156.60
  6. Step 6: Final answer
    x = 12,340.18

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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.