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Finding the Fourth Proportional to 7,318.88, 10,978.52 and 2,389.08

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Solution

The fourth proportional to 7,318.88, 10,978.52 and 2,389.08 is: 3,583.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,318.88 : 10,978.52 = 2,389.08 : x
  2. Step 2: Convert to fraction form
    7,318.88/10,978.52 = 2,389.08/x
  3. Step 3: Cross multiply
    7,318.88x = 10,978.52 × 2,389.08
  4. Step 4: Simplify right side
    7,318.88x = 26,228,562.56
  5. Step 5: Solve for x
    x = 26,228,562.56/7,318.88
  6. Step 6: Final answer
    x = 3,583.69

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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.