Home / 7,968.78-11,957.98-2,778.30

Finding the Fourth Proportional to 7,968.78, 11,957.98 and 2,778.30

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Solution

The fourth proportional to 7,968.78, 11,957.98 and 2,778.30 is: 4,169.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,968.78 : 11,957.98 = 2,778.30 : x
  2. Step 2: Convert to fraction form
    7,968.78/11,957.98 = 2,778.30/x
  3. Step 3: Cross multiply
    7,968.78x = 11,957.98 × 2,778.30
  4. Step 4: Simplify right side
    7,968.78x = 33,222,855.83
  5. Step 5: Solve for x
    x = 33,222,855.83/7,968.78
  6. Step 6: Final answer
    x = 4,169.13

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1.5x scale

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.