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Finding the Fourth Proportional to 26,135.50, 39,209.91 and 7,667.50

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Solution

The fourth proportional to 26,135.50, 39,209.91 and 7,667.50 is: 11,503.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,135.50 : 39,209.91 = 7,667.50 : x
  2. Step 2: Convert to fraction form
    26,135.50/39,209.91 = 7,667.50/x
  3. Step 3: Cross multiply
    26,135.50x = 39,209.91 × 7,667.50
  4. Step 4: Simplify right side
    26,135.50x = 300,641,984.93
  5. Step 5: Solve for x
    x = 300,641,984.93/26,135.50
  6. Step 6: Final answer
    x = 11,503.20

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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.