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Finding the Fourth Proportional to 9,964.70, 13,751.70 and 5,716.95

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Solution

The fourth proportional to 9,964.70, 13,751.70 and 5,716.95 is: 7,889.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,964.70 : 13,751.70 = 5,716.95 : x
  2. Step 2: Convert to fraction form
    9,964.70/13,751.70 = 5,716.95/x
  3. Step 3: Cross multiply
    9,964.70x = 13,751.70 × 5,716.95
  4. Step 4: Simplify right side
    9,964.70x = 78,617,781.32
  5. Step 5: Solve for x
    x = 78,617,781.32/9,964.70
  6. Step 6: Final answer
    x = 7,889.63

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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.