Home / 12,119.20-16,732.78-9,281.56

Finding the Fourth Proportional to 12,119.20, 16,732.78 and 9,281.56

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Solution

The fourth proportional to 12,119.20, 16,732.78 and 9,281.56 is: 12,814.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,119.20 : 16,732.78 = 9,281.56 : x
  2. Step 2: Convert to fraction form
    12,119.20/16,732.78 = 9,281.56/x
  3. Step 3: Cross multiply
    12,119.20x = 16,732.78 × 9,281.56
  4. Step 4: Simplify right side
    12,119.20x = 155,306,301.54
  5. Step 5: Solve for x
    x = 155,306,301.54/12,119.20
  6. Step 6: Final answer
    x = 12,814.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.