Home / 20,275.20-27,979.84-11,323.03

Finding the Fourth Proportional to 20,275.20, 27,979.84 and 11,323.03

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Solution

The fourth proportional to 20,275.20, 27,979.84 and 11,323.03 is: 15,625.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,275.20 : 27,979.84 = 11,323.03 : x
  2. Step 2: Convert to fraction form
    20,275.20/27,979.84 = 11,323.03/x
  3. Step 3: Cross multiply
    20,275.20x = 27,979.84 × 11,323.03
  4. Step 4: Simplify right side
    20,275.20x = 316,816,511.10
  5. Step 5: Solve for x
    x = 316,816,511.10/20,275.20
  6. Step 6: Final answer
    x = 15,625.82

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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.