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Finding the Fourth Proportional to 7,315.96, 10,979.20 and 4,855.98

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Solution

The fourth proportional to 7,315.96, 10,979.20 and 4,855.98 is: 7,287.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,315.96 : 10,979.20 = 4,855.98 : x
  2. Step 2: Convert to fraction form
    7,315.96/10,979.20 = 4,855.98/x
  3. Step 3: Cross multiply
    7,315.96x = 10,979.20 × 4,855.98
  4. Step 4: Simplify right side
    7,315.96x = 53,314,775.62
  5. Step 5: Solve for x
    x = 53,314,775.62/7,315.96
  6. Step 6: Final answer
    x = 7,287.46

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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.