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Finding the Fourth Proportional to 5,291.90, 7,938.21 and 2,694.14

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Solution

The fourth proportional to 5,291.90, 7,938.21 and 2,694.14 is: 4,041.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,291.90 : 7,938.21 = 2,694.14 : x
  2. Step 2: Convert to fraction form
    5,291.90/7,938.21 = 2,694.14/x
  3. Step 3: Cross multiply
    5,291.90x = 7,938.21 × 2,694.14
  4. Step 4: Simplify right side
    5,291.90x = 21,386,649.09
  5. Step 5: Solve for x
    x = 21,386,649.09/5,291.90
  6. Step 6: Final answer
    x = 4,041.39

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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.