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Finding the Fourth Proportional to 28,140.96, 42,198.48 and 15,828.96

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Solution

The fourth proportional to 28,140.96, 42,198.48 and 15,828.96 is: 23,736.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,140.96 : 42,198.48 = 15,828.96 : x
  2. Step 2: Convert to fraction form
    28,140.96/42,198.48 = 15,828.96/x
  3. Step 3: Cross multiply
    28,140.96x = 42,198.48 × 15,828.96
  4. Step 4: Simplify right side
    28,140.96x = 667,958,051.98
  5. Step 5: Solve for x
    x = 667,958,051.98/28,140.96
  6. Step 6: Final answer
    x = 23,736.15

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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.