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Finding the Fourth Proportional to 5,331.64, 7,986.75 and 2,655.17

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Solution

The fourth proportional to 5,331.64, 7,986.75 and 2,655.17 is: 3,977.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,331.64 : 7,986.75 = 2,655.17 : x
  2. Step 2: Convert to fraction form
    5,331.64/7,986.75 = 2,655.17/x
  3. Step 3: Cross multiply
    5,331.64x = 7,986.75 × 2,655.17
  4. Step 4: Simplify right side
    5,331.64x = 21,206,139.06
  5. Step 5: Solve for x
    x = 21,206,139.06/5,331.64
  6. Step 6: Final answer
    x = 3,977.41

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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.