Home / 12,112.20-18,139.14-8,204.76

Finding the Fourth Proportional to 12,112.20, 18,139.14 and 8,204.76

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Solution

The fourth proportional to 12,112.20, 18,139.14 and 8,204.76 is: 12,287.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,112.20 : 18,139.14 = 8,204.76 : x
  2. Step 2: Convert to fraction form
    12,112.20/18,139.14 = 8,204.76/x
  3. Step 3: Cross multiply
    12,112.20x = 18,139.14 × 8,204.76
  4. Step 4: Simplify right side
    12,112.20x = 148,827,290.31
  5. Step 5: Solve for x
    x = 148,827,290.31/12,112.20
  6. Step 6: Final answer
    x = 12,287.39

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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.