Home / 7,878.98-11,815.53-2,613.02

Finding the Fourth Proportional to 7,878.98, 11,815.53 and 2,613.02

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Solution

The fourth proportional to 7,878.98, 11,815.53 and 2,613.02 is: 3,918.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.98 : 11,815.53 = 2,613.02 : x
  2. Step 2: Convert to fraction form
    7,878.98/11,815.53 = 2,613.02/x
  3. Step 3: Cross multiply
    7,878.98x = 11,815.53 × 2,613.02
  4. Step 4: Simplify right side
    7,878.98x = 30,874,216.20
  5. Step 5: Solve for x
    x = 30,874,216.20/7,878.98
  6. Step 6: Final answer
    x = 3,918.55

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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.