Home / 20,275.12-27,979.88-11,891.76

Finding the Fourth Proportional to 20,275.12, 27,979.88 and 11,891.76

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Solution

The fourth proportional to 20,275.12, 27,979.88 and 11,891.76 is: 16,410.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,275.12 : 27,979.88 = 11,891.76 : x
  2. Step 2: Convert to fraction form
    20,275.12/27,979.88 = 11,891.76/x
  3. Step 3: Cross multiply
    20,275.12x = 27,979.88 × 11,891.76
  4. Step 4: Simplify right side
    20,275.12x = 332,730,017.79
  5. Step 5: Solve for x
    x = 332,730,017.79/20,275.12
  6. Step 6: Final answer
    x = 16,410.75

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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.