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Finding the Fourth Proportional to 9,620, 13,276.62 and 5,644.46

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Solution

The fourth proportional to 9,620, 13,276.62 and 5,644.46 is: 7,789.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,620 : 13,276.62 = 5,644.46 : x
  2. Step 2: Convert to fraction form
    9,620/13,276.62 = 5,644.46/x
  3. Step 3: Cross multiply
    9,620x = 13,276.62 × 5,644.46
  4. Step 4: Simplify right side
    9,620x = 74,939,350.53
  5. Step 5: Solve for x
    x = 74,939,350.53/9,620
  6. Step 6: Final answer
    x = 7,789.95

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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.