Home / 27,804.21-38,387.24-21,418.78

Finding the Fourth Proportional to 27,804.21, 38,387.24 and 21,418.78

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Solution

The fourth proportional to 27,804.21, 38,387.24 and 21,418.78 is: 29,571.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,804.21 : 38,387.24 = 21,418.78 : x
  2. Step 2: Convert to fraction form
    27,804.21/38,387.24 = 21,418.78/x
  3. Step 3: Cross multiply
    27,804.21x = 38,387.24 × 21,418.78
  4. Step 4: Simplify right side
    27,804.21x = 822,207,857.84
  5. Step 5: Solve for x
    x = 822,207,857.84/27,804.21
  6. Step 6: Final answer
    x = 29,571.34

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1.5x scale

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.