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Finding the Fourth Proportional to 27,388.80, 40,996.80 and 19,612.80

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Solution

The fourth proportional to 27,388.80, 40,996.80 and 19,612.80 is: 29,357.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,388.80 : 40,996.80 = 19,612.80 : x
  2. Step 2: Convert to fraction form
    27,388.80/40,996.80 = 19,612.80/x
  3. Step 3: Cross multiply
    27,388.80x = 40,996.80 × 19,612.80
  4. Step 4: Simplify right side
    27,388.80x = 804,062,039.04
  5. Step 5: Solve for x
    x = 804,062,039.04/27,388.80
  6. Step 6: Final answer
    x = 29,357.33

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1.5x scale

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.