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Finding the Fourth Proportional to 28,374.99, 42,556.01 and 8,380.20

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Solution

The fourth proportional to 28,374.99, 42,556.01 and 8,380.20 is: 12,568.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,374.99 : 42,556.01 = 8,380.20 : x
  2. Step 2: Convert to fraction form
    28,374.99/42,556.01 = 8,380.20/x
  3. Step 3: Cross multiply
    28,374.99x = 42,556.01 × 8,380.20
  4. Step 4: Simplify right side
    28,374.99x = 356,627,833.10
  5. Step 5: Solve for x
    x = 356,627,833.10/28,374.99
  6. Step 6: Final answer
    x = 12,568.39

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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.