Home / 39,042.85-53,879.11-21,137.85

Finding the Fourth Proportional to 39,042.85, 53,879.11 and 21,137.85

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Solution

The fourth proportional to 39,042.85, 53,879.11 and 21,137.85 is: 29,170.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,042.85 : 53,879.11 = 21,137.85 : x
  2. Step 2: Convert to fraction form
    39,042.85/53,879.11 = 21,137.85/x
  3. Step 3: Cross multiply
    39,042.85x = 53,879.11 × 21,137.85
  4. Step 4: Simplify right side
    39,042.85x = 1,138,888,545.31
  5. Step 5: Solve for x
    x = 1,138,888,545.31/39,042.85
  6. Step 6: Final answer
    x = 29,170.22

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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.