Home / 3,993-5,511.30-2,890.92

Finding the Fourth Proportional to 3,993, 5,511.30 and 2,890.92

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Solution

The fourth proportional to 3,993, 5,511.30 and 2,890.92 is: 3,990.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,993 : 5,511.30 = 2,890.92 : x
  2. Step 2: Convert to fraction form
    3,993/5,511.30 = 2,890.92/x
  3. Step 3: Cross multiply
    3,993x = 5,511.30 × 2,890.92
  4. Step 4: Simplify right side
    3,993x = 15,932,727.40
  5. Step 5: Solve for x
    x = 15,932,727.40/3,993
  6. Step 6: Final answer
    x = 3,990.16

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Half scale
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Double scale
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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.