Home / 27,785.38-38,341.39-15,685.20

Finding the Fourth Proportional to 27,785.38, 38,341.39 and 15,685.20

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Solution

The fourth proportional to 27,785.38, 38,341.39 and 15,685.20 is: 21,644.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,785.38 : 38,341.39 = 15,685.20 : x
  2. Step 2: Convert to fraction form
    27,785.38/38,341.39 = 15,685.20/x
  3. Step 3: Cross multiply
    27,785.38x = 38,341.39 × 15,685.20
  4. Step 4: Simplify right side
    27,785.38x = 601,392,370.43
  5. Step 5: Solve for x
    x = 601,392,370.43/27,785.38
  6. Step 6: Final answer
    x = 21,644.20

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Half scale
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Double scale
Find fourth proportional to 27,786.38, 38,342.77 and 15,686.20
Similar ratio
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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.