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Finding the Fourth Proportional to 7,326.50, 10,989.81 and 1,779.86

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Solution

The fourth proportional to 7,326.50, 10,989.81 and 1,779.86 is: 2,669.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,326.50 : 10,989.81 = 1,779.86 : x
  2. Step 2: Convert to fraction form
    7,326.50/10,989.81 = 1,779.86/x
  3. Step 3: Cross multiply
    7,326.50x = 10,989.81 × 1,779.86
  4. Step 4: Simplify right side
    7,326.50x = 19,560,350.70
  5. Step 5: Solve for x
    x = 19,560,350.70/7,326.50
  6. Step 6: Final answer
    x = 2,669.81

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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.