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Finding the Fourth Proportional to 5,721.16, 7,897.62 and 3,860.68

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Solution

The fourth proportional to 5,721.16, 7,897.62 and 3,860.68 is: 5,329.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,721.16 : 7,897.62 = 3,860.68 : x
  2. Step 2: Convert to fraction form
    5,721.16/7,897.62 = 3,860.68/x
  3. Step 3: Cross multiply
    5,721.16x = 7,897.62 × 3,860.68
  4. Step 4: Simplify right side
    5,721.16x = 30,490,183.58
  5. Step 5: Solve for x
    x = 30,490,183.58/5,721.16
  6. Step 6: Final answer
    x = 5,329.37

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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.