Home / 27,687.32-38,208.90-15,111.80

Finding the Fourth Proportional to 27,687.32, 38,208.90 and 15,111.80

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Solution

The fourth proportional to 27,687.32, 38,208.90 and 15,111.80 is: 20,854.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,687.32 : 38,208.90 = 15,111.80 : x
  2. Step 2: Convert to fraction form
    27,687.32/38,208.90 = 15,111.80/x
  3. Step 3: Cross multiply
    27,687.32x = 38,208.90 × 15,111.80
  4. Step 4: Simplify right side
    27,687.32x = 577,405,255.02
  5. Step 5: Solve for x
    x = 577,405,255.02/27,687.32
  6. Step 6: Final answer
    x = 20,854.50

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Half scale
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Double scale
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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.