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Finding the Fourth Proportional to 26,398.40, 39,583.20 and 8,859.20

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Solution

The fourth proportional to 26,398.40, 39,583.20 and 8,859.20 is: 13,283.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,398.40 : 39,583.20 = 8,859.20 : x
  2. Step 2: Convert to fraction form
    26,398.40/39,583.20 = 8,859.20/x
  3. Step 3: Cross multiply
    26,398.40x = 39,583.20 × 8,859.20
  4. Step 4: Simplify right side
    26,398.40x = 350,675,485.44
  5. Step 5: Solve for x
    x = 350,675,485.44/26,398.40
  6. Step 6: Final answer
    x = 13,283.97

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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.