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Finding the Fourth Proportional to 18,879.73, 28,319.47 and 4,839.73

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Solution

The fourth proportional to 18,879.73, 28,319.47 and 4,839.73 is: 7,259.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,879.73 : 28,319.47 = 4,839.73 : x
  2. Step 2: Convert to fraction form
    18,879.73/28,319.47 = 4,839.73/x
  3. Step 3: Cross multiply
    18,879.73x = 28,319.47 × 4,839.73
  4. Step 4: Simplify right side
    18,879.73x = 137,058,588.54
  5. Step 5: Solve for x
    x = 137,058,588.54/18,879.73
  6. Step 6: Final answer
    x = 7,259.56

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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.