Home / 7,618.92-11,431.05-3,178.98

Finding the Fourth Proportional to 7,618.92, 11,431.05 and 3,178.98

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Solution

The fourth proportional to 7,618.92, 11,431.05 and 3,178.98 is: 4,769.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,618.92 : 11,431.05 = 3,178.98 : x
  2. Step 2: Convert to fraction form
    7,618.92/11,431.05 = 3,178.98/x
  3. Step 3: Cross multiply
    7,618.92x = 11,431.05 × 3,178.98
  4. Step 4: Simplify right side
    7,618.92x = 36,339,079.33
  5. Step 5: Solve for x
    x = 36,339,079.33/7,618.92
  6. Step 6: Final answer
    x = 4,769.58

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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.