Home / 38,780.36-53,517.11-21,785.32

Finding the Fourth Proportional to 38,780.36, 53,517.11 and 21,785.32

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Solution

The fourth proportional to 38,780.36, 53,517.11 and 21,785.32 is: 30,063.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,780.36 : 53,517.11 = 21,785.32 : x
  2. Step 2: Convert to fraction form
    38,780.36/53,517.11 = 21,785.32/x
  3. Step 3: Cross multiply
    38,780.36x = 53,517.11 × 21,785.32
  4. Step 4: Simplify right side
    38,780.36x = 1,165,887,508.61
  5. Step 5: Solve for x
    x = 1,165,887,508.61/38,780.36
  6. Step 6: Final answer
    x = 30,063.86

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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.