Home / 21,218.11-31,789.19-14,176.80

Finding the Fourth Proportional to 21,218.11, 31,789.19 and 14,176.80

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Solution

The fourth proportional to 21,218.11, 31,789.19 and 14,176.80 is: 21,239.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.11 : 31,789.19 = 14,176.80 : x
  2. Step 2: Convert to fraction form
    21,218.11/31,789.19 = 14,176.80/x
  3. Step 3: Cross multiply
    21,218.11x = 31,789.19 × 14,176.80
  4. Step 4: Simplify right side
    21,218.11x = 450,669,024.23
  5. Step 5: Solve for x
    x = 450,669,024.23/21,218.11
  6. Step 6: Final answer
    x = 21,239.83

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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.