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Finding the Fourth Proportional to 5,628.33, 7,761.91 and 5,181.19

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Solution

The fourth proportional to 5,628.33, 7,761.91 and 5,181.19 is: 7,145.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,628.33 : 7,761.91 = 5,181.19 : x
  2. Step 2: Convert to fraction form
    5,628.33/7,761.91 = 5,181.19/x
  3. Step 3: Cross multiply
    5,628.33x = 7,761.91 × 5,181.19
  4. Step 4: Simplify right side
    5,628.33x = 40,215,907.83
  5. Step 5: Solve for x
    x = 40,215,907.83/5,628.33
  6. Step 6: Final answer
    x = 7,145.26

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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.