Home / 12,728.20-18,998.61-11,836.84

Finding the Fourth Proportional to 12,728.20, 18,998.61 and 11,836.84

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Solution

The fourth proportional to 12,728.20, 18,998.61 and 11,836.84 is: 17,668.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,728.20 : 18,998.61 = 11,836.84 : x
  2. Step 2: Convert to fraction form
    12,728.20/18,998.61 = 11,836.84/x
  3. Step 3: Cross multiply
    12,728.20x = 18,998.61 × 11,836.84
  4. Step 4: Simplify right side
    12,728.20x = 224,883,506.79
  5. Step 5: Solve for x
    x = 224,883,506.79/12,728.20
  6. Step 6: Final answer
    x = 17,668.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.