Home / 28,545.08-39,391.39-15,798.78

Finding the Fourth Proportional to 28,545.08, 39,391.39 and 15,798.78

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Solution

The fourth proportional to 28,545.08, 39,391.39 and 15,798.78 is: 21,801.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,545.08 : 39,391.39 = 15,798.78 : x
  2. Step 2: Convert to fraction form
    28,545.08/39,391.39 = 15,798.78/x
  3. Step 3: Cross multiply
    28,545.08x = 39,391.39 × 15,798.78
  4. Step 4: Simplify right side
    28,545.08x = 622,335,879.82
  5. Step 5: Solve for x
    x = 622,335,879.82/28,545.08
  6. Step 6: Final answer
    x = 21,801.87

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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.