Home / 12,489.28-17,237.61-8,018.69

Finding the Fourth Proportional to 12,489.28, 17,237.61 and 8,018.69

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Solution

The fourth proportional to 12,489.28, 17,237.61 and 8,018.69 is: 11,067.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.28 : 17,237.61 = 8,018.69 : x
  2. Step 2: Convert to fraction form
    12,489.28/17,237.61 = 8,018.69/x
  3. Step 3: Cross multiply
    12,489.28x = 17,237.61 × 8,018.69
  4. Step 4: Simplify right side
    12,489.28x = 138,222,964.74
  5. Step 5: Solve for x
    x = 138,222,964.74/12,489.28
  6. Step 6: Final answer
    x = 11,067.33

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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.