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Finding the Fourth Proportional to 28,228.26, 42,342.42 and 7,169.88

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Solution

The fourth proportional to 28,228.26, 42,342.42 and 7,169.88 is: 10,754.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,228.26 : 42,342.42 = 7,169.88 : x
  2. Step 2: Convert to fraction form
    28,228.26/42,342.42 = 7,169.88/x
  3. Step 3: Cross multiply
    28,228.26x = 42,342.42 × 7,169.88
  4. Step 4: Simplify right side
    28,228.26x = 303,590,070.31
  5. Step 5: Solve for x
    x = 303,590,070.31/28,228.26
  6. Step 6: Final answer
    x = 10,754.83

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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.