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Finding the Fourth Proportional to 6,463.75, 9,695.70 and 2,081.20

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Solution

The fourth proportional to 6,463.75, 9,695.70 and 2,081.20 is: 3,121.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,463.75 : 9,695.70 = 2,081.20 : x
  2. Step 2: Convert to fraction form
    6,463.75/9,695.70 = 2,081.20/x
  3. Step 3: Cross multiply
    6,463.75x = 9,695.70 × 2,081.20
  4. Step 4: Simplify right side
    6,463.75x = 20,178,690.84
  5. Step 5: Solve for x
    x = 20,178,690.84/6,463.75
  6. Step 6: Final answer
    x = 3,121.82

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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.