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Finding the Fourth Proportional to 26,908.80, 40,357.80 and 12,868.80

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Solution

The fourth proportional to 26,908.80, 40,357.80 and 12,868.80 is: 19,300.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,908.80 : 40,357.80 = 12,868.80 : x
  2. Step 2: Convert to fraction form
    26,908.80/40,357.80 = 12,868.80/x
  3. Step 3: Cross multiply
    26,908.80x = 40,357.80 × 12,868.80
  4. Step 4: Simplify right side
    26,908.80x = 519,356,456.64
  5. Step 5: Solve for x
    x = 519,356,456.64/26,908.80
  6. Step 6: Final answer
    x = 19,300.62

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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.