Home / 7,815.61-11,721.25-3,431.98

Finding the Fourth Proportional to 7,815.61, 11,721.25 and 3,431.98

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Solution

The fourth proportional to 7,815.61, 11,721.25 and 3,431.98 is: 5,147.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.61 : 11,721.25 = 3,431.98 : x
  2. Step 2: Convert to fraction form
    7,815.61/11,721.25 = 3,431.98/x
  3. Step 3: Cross multiply
    7,815.61x = 11,721.25 × 3,431.98
  4. Step 4: Simplify right side
    7,815.61x = 40,227,095.58
  5. Step 5: Solve for x
    x = 40,227,095.58/7,815.61
  6. Step 6: Final answer
    x = 5,147.02

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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.