Home / 20,943.65-28,907.35-12,879.29

Finding the Fourth Proportional to 20,943.65, 28,907.35 and 12,879.29

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Solution

The fourth proportional to 20,943.65, 28,907.35 and 12,879.29 is: 17,776.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,943.65 : 28,907.35 = 12,879.29 : x
  2. Step 2: Convert to fraction form
    20,943.65/28,907.35 = 12,879.29/x
  3. Step 3: Cross multiply
    20,943.65x = 28,907.35 × 12,879.29
  4. Step 4: Simplify right side
    20,943.65x = 372,306,183.85
  5. Step 5: Solve for x
    x = 372,306,183.85/20,943.65
  6. Step 6: Final answer
    x = 17,776.56

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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.