Home / 27,990.32-38,629.44-20,904.44

Finding the Fourth Proportional to 27,990.32, 38,629.44 and 20,904.44

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Solution

The fourth proportional to 27,990.32, 38,629.44 and 20,904.44 is: 28,850.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,990.32 : 38,629.44 = 20,904.44 : x
  2. Step 2: Convert to fraction form
    27,990.32/38,629.44 = 20,904.44/x
  3. Step 3: Cross multiply
    27,990.32x = 38,629.44 × 20,904.44
  4. Step 4: Simplify right side
    27,990.32x = 807,526,810.71
  5. Step 5: Solve for x
    x = 807,526,810.71/27,990.32
  6. Step 6: Final answer
    x = 28,850.22

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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.