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Finding the Fourth Proportional to 26,550, 36,639 and 15,372

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Solution

The fourth proportional to 26,550, 36,639 and 15,372 is: 21,213.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,550 : 36,639 = 15,372 : x
  2. Step 2: Convert to fraction form
    26,550/36,639 = 15,372/x
  3. Step 3: Cross multiply
    26,550x = 36,639 × 15,372
  4. Step 4: Simplify right side
    26,550x = 563,214,708
  5. Step 5: Solve for x
    x = 563,214,708/26,550
  6. Step 6: Final answer
    x = 21,213.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.