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Finding the Fourth Proportional to 18,969.58, 28,451.87 and 5,820.85

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Solution

The fourth proportional to 18,969.58, 28,451.87 and 5,820.85 is: 8,730.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,969.58 : 28,451.87 = 5,820.85 : x
  2. Step 2: Convert to fraction form
    18,969.58/28,451.87 = 5,820.85/x
  3. Step 3: Cross multiply
    18,969.58x = 28,451.87 × 5,820.85
  4. Step 4: Simplify right side
    18,969.58x = 165,614,067.49
  5. Step 5: Solve for x
    x = 165,614,067.49/18,969.58
  6. Step 6: Final answer
    x = 8,730.51

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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.