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Finding the Fourth Proportional to 3,721.67, 5,591.21 and 3,511.51

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Solution

The fourth proportional to 3,721.67, 5,591.21 and 3,511.51 is: 5,275.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,721.67 : 5,591.21 = 3,511.51 : x
  2. Step 2: Convert to fraction form
    3,721.67/5,591.21 = 3,511.51/x
  3. Step 3: Cross multiply
    3,721.67x = 5,591.21 × 3,511.51
  4. Step 4: Simplify right side
    3,721.67x = 19,633,589.83
  5. Step 5: Solve for x
    x = 19,633,589.83/3,721.67
  6. Step 6: Final answer
    x = 5,275.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.