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Finding the Fourth Proportional to 26,648.80, 39,902.80 and 21,359.20

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Solution

The fourth proportional to 26,648.80, 39,902.80 and 21,359.20 is: 31,982.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,648.80 : 39,902.80 = 21,359.20 : x
  2. Step 2: Convert to fraction form
    26,648.80/39,902.80 = 21,359.20/x
  3. Step 3: Cross multiply
    26,648.80x = 39,902.80 × 21,359.20
  4. Step 4: Simplify right side
    26,648.80x = 852,291,885.76
  5. Step 5: Solve for x
    x = 852,291,885.76/26,648.80
  6. Step 6: Final answer
    x = 31,982.37

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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.