Home / 7,815.39-11,723.13-3,918.93

Finding the Fourth Proportional to 7,815.39, 11,723.13 and 3,918.93

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Solution

The fourth proportional to 7,815.39, 11,723.13 and 3,918.93 is: 5,878.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.39 : 11,723.13 = 3,918.93 : x
  2. Step 2: Convert to fraction form
    7,815.39/11,723.13 = 3,918.93/x
  3. Step 3: Cross multiply
    7,815.39x = 11,723.13 × 3,918.93
  4. Step 4: Simplify right side
    7,815.39x = 45,942,125.85
  5. Step 5: Solve for x
    x = 45,942,125.85/7,815.39
  6. Step 6: Final answer
    x = 5,878.42

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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.