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Finding the Fourth Proportional to 18,879.63, 28,319.25 and 5,028.63

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Solution

The fourth proportional to 18,879.63, 28,319.25 and 5,028.63 is: 7,542.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,879.63 : 28,319.25 = 5,028.63 : x
  2. Step 2: Convert to fraction form
    18,879.63/28,319.25 = 5,028.63/x
  3. Step 3: Cross multiply
    18,879.63x = 28,319.25 × 5,028.63
  4. Step 4: Simplify right side
    18,879.63x = 142,407,030.13
  5. Step 5: Solve for x
    x = 142,407,030.13/18,879.63
  6. Step 6: Final answer
    x = 7,542.89

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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.