Home / 27,686.82-38,208.21-15,111.30

Finding the Fourth Proportional to 27,686.82, 38,208.21 and 15,111.30

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Solution

The fourth proportional to 27,686.82, 38,208.21 and 15,111.30 is: 20,853.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,686.82 : 38,208.21 = 15,111.30 : x
  2. Step 2: Convert to fraction form
    27,686.82/38,208.21 = 15,111.30/x
  3. Step 3: Cross multiply
    27,686.82x = 38,208.21 × 15,111.30
  4. Step 4: Simplify right side
    27,686.82x = 577,375,723.77
  5. Step 5: Solve for x
    x = 577,375,723.77/27,686.82
  6. Step 6: Final answer
    x = 20,853.81

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Half scale
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Double scale
Find fourth proportional to 27,687.82, 38,209.59 and 15,112.30
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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.