Home / 38,785.91-53,521.40-21,789.23

Finding the Fourth Proportional to 38,785.91, 53,521.40 and 21,789.23

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Solution

The fourth proportional to 38,785.91, 53,521.40 and 21,789.23 is: 30,067.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,785.91 : 53,521.40 = 21,789.23 : x
  2. Step 2: Convert to fraction form
    38,785.91/53,521.40 = 21,789.23/x
  3. Step 3: Cross multiply
    38,785.91x = 53,521.40 × 21,789.23
  4. Step 4: Simplify right side
    38,785.91x = 1,166,189,717.97
  5. Step 5: Solve for x
    x = 1,166,189,717.97/38,785.91
  6. Step 6: Final answer
    x = 30,067.36

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Half scale
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Double scale
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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.