Home / 18,318.69-27,478.85-7,778.16

Finding the Fourth Proportional to 18,318.69, 27,478.85 and 7,778.16

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Solution

The fourth proportional to 18,318.69, 27,478.85 and 7,778.16 is: 11,667.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,318.69 : 27,478.85 = 7,778.16 : x
  2. Step 2: Convert to fraction form
    18,318.69/27,478.85 = 7,778.16/x
  3. Step 3: Cross multiply
    18,318.69x = 27,478.85 × 7,778.16
  4. Step 4: Simplify right side
    18,318.69x = 213,734,853.03
  5. Step 5: Solve for x
    x = 213,734,853.03/18,318.69
  6. Step 6: Final answer
    x = 11,667.58

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Similar ratio
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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.