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Finding the Fourth Proportional to 3,993.70, 5,511.28 and 2,225.28

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Solution

The fourth proportional to 3,993.70, 5,511.28 and 2,225.28 is: 3,070.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,993.70 : 5,511.28 = 2,225.28 : x
  2. Step 2: Convert to fraction form
    3,993.70/5,511.28 = 2,225.28/x
  3. Step 3: Cross multiply
    3,993.70x = 5,511.28 × 2,225.28
  4. Step 4: Simplify right side
    3,993.70x = 12,264,141.16
  5. Step 5: Solve for x
    x = 12,264,141.16/3,993.70
  6. Step 6: Final answer
    x = 3,070.87

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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.