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Finding the Fourth Proportional to 7,318.80, 10,989.09 and 7,063.65

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Solution

The fourth proportional to 7,318.80, 10,989.09 and 7,063.65 is: 10,605.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,318.80 : 10,989.09 = 7,063.65 : x
  2. Step 2: Convert to fraction form
    7,318.80/10,989.09 = 7,063.65/x
  3. Step 3: Cross multiply
    7,318.80x = 10,989.09 × 7,063.65
  4. Step 4: Simplify right side
    7,318.80x = 77,623,085.58
  5. Step 5: Solve for x
    x = 77,623,085.58/7,318.80
  6. Step 6: Final answer
    x = 10,605.99

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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.