Home / 28,227.40-39,021.78-21,545.80

Finding the Fourth Proportional to 28,227.40, 39,021.78 and 21,545.80

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Solution

The fourth proportional to 28,227.40, 39,021.78 and 21,545.80 is: 29,785.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,227.40 : 39,021.78 = 21,545.80 : x
  2. Step 2: Convert to fraction form
    28,227.40/39,021.78 = 21,545.80/x
  3. Step 3: Cross multiply
    28,227.40x = 39,021.78 × 21,545.80
  4. Step 4: Simplify right side
    28,227.40x = 840,755,467.52
  5. Step 5: Solve for x
    x = 840,755,467.52/28,227.40
  6. Step 6: Final answer
    x = 29,785.08

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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.