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Finding the Fourth Proportional to 11,603.79, 17,389.96 and 8,469.09

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Solution

The fourth proportional to 11,603.79, 17,389.96 and 8,469.09 is: 12,692.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,603.79 : 17,389.96 = 8,469.09 : x
  2. Step 2: Convert to fraction form
    11,603.79/17,389.96 = 8,469.09/x
  3. Step 3: Cross multiply
    11,603.79x = 17,389.96 × 8,469.09
  4. Step 4: Simplify right side
    11,603.79x = 147,277,115.16
  5. Step 5: Solve for x
    x = 147,277,115.16/11,603.79
  6. Step 6: Final answer
    x = 12,692.16

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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.