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Finding the Fourth Proportional to 26,487, 39,745.08 and 12,636

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Solution

The fourth proportional to 26,487, 39,745.08 and 12,636 is: 18,960.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,487 : 39,745.08 = 12,636 : x
  2. Step 2: Convert to fraction form
    26,487/39,745.08 = 12,636/x
  3. Step 3: Cross multiply
    26,487x = 39,745.08 × 12,636
  4. Step 4: Simplify right side
    26,487x = 502,218,830.88
  5. Step 5: Solve for x
    x = 502,218,830.88/26,487
  6. Step 6: Final answer
    x = 18,960.96

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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.