Home / 27,808.21-38,392.77-21,422.79

Finding the Fourth Proportional to 27,808.21, 38,392.77 and 21,422.79

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Solution

The fourth proportional to 27,808.21, 38,392.77 and 21,422.79 is: 29,576.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,808.21 : 38,392.77 = 21,422.79 : x
  2. Step 2: Convert to fraction form
    27,808.21/38,392.77 = 21,422.79/x
  3. Step 3: Cross multiply
    27,808.21x = 38,392.77 × 21,422.79
  4. Step 4: Simplify right side
    27,808.21x = 822,480,249.23
  5. Step 5: Solve for x
    x = 822,480,249.23/27,808.21
  6. Step 6: Final answer
    x = 29,576.89

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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.