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Finding the Fourth Proportional to 6,939.52, 10,401.90 and 3,430.60

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Solution

The fourth proportional to 6,939.52, 10,401.90 and 3,430.60 is: 5,142.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,939.52 : 10,401.90 = 3,430.60 : x
  2. Step 2: Convert to fraction form
    6,939.52/10,401.90 = 3,430.60/x
  3. Step 3: Cross multiply
    6,939.52x = 10,401.90 × 3,430.60
  4. Step 4: Simplify right side
    6,939.52x = 35,684,758.14
  5. Step 5: Solve for x
    x = 35,684,758.14/6,939.52
  6. Step 6: Final answer
    x = 5,142.25

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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.