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Finding the Fourth Proportional to 26,331.80, 36,313.80 and 20,590

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Solution

The fourth proportional to 26,331.80, 36,313.80 and 20,590 is: 28,395.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,331.80 : 36,313.80 = 20,590 : x
  2. Step 2: Convert to fraction form
    26,331.80/36,313.80 = 20,590/x
  3. Step 3: Cross multiply
    26,331.80x = 36,313.80 × 20,590
  4. Step 4: Simplify right side
    26,331.80x = 747,701,142.00
  5. Step 5: Solve for x
    x = 747,701,142.00/26,331.80
  6. Step 6: Final answer
    x = 28,395.37

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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.