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Finding the Fourth Proportional to 11,778.50, 17,667.78 and 3,570.50

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Solution

The fourth proportional to 11,778.50, 17,667.78 and 3,570.50 is: 5,355.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,778.50 : 17,667.78 = 3,570.50 : x
  2. Step 2: Convert to fraction form
    11,778.50/17,667.78 = 3,570.50/x
  3. Step 3: Cross multiply
    11,778.50x = 17,667.78 × 3,570.50
  4. Step 4: Simplify right side
    11,778.50x = 63,082,808.49
  5. Step 5: Solve for x
    x = 63,082,808.49/11,778.50
  6. Step 6: Final answer
    x = 5,355.76

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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.