Home / 20,789.38-28,689.35-11,357.95

Finding the Fourth Proportional to 20,789.38, 28,689.35 and 11,357.95

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Solution

The fourth proportional to 20,789.38, 28,689.35 and 11,357.95 is: 15,673.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.38 : 28,689.35 = 11,357.95 : x
  2. Step 2: Convert to fraction form
    20,789.38/28,689.35 = 11,357.95/x
  3. Step 3: Cross multiply
    20,789.38x = 28,689.35 × 11,357.95
  4. Step 4: Simplify right side
    20,789.38x = 325,852,079.37
  5. Step 5: Solve for x
    x = 325,852,079.37/20,789.38
  6. Step 6: Final answer
    x = 15,673.97

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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.