Home / 12,581.28-18,869.40-11,956.80

Finding the Fourth Proportional to 12,581.28, 18,869.40 and 11,956.80

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Solution

The fourth proportional to 12,581.28, 18,869.40 and 11,956.80 is: 17,932.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,581.28 : 18,869.40 = 11,956.80 : x
  2. Step 2: Convert to fraction form
    12,581.28/18,869.40 = 11,956.80/x
  3. Step 3: Cross multiply
    12,581.28x = 18,869.40 × 11,956.80
  4. Step 4: Simplify right side
    12,581.28x = 225,617,641.92
  5. Step 5: Solve for x
    x = 225,617,641.92/12,581.28
  6. Step 6: Final answer
    x = 17,932.81

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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.