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Finding the Fourth Proportional to 28,245.92, 42,368.58 and 7,185.96

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Solution

The fourth proportional to 28,245.92, 42,368.58 and 7,185.96 is: 10,778.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,245.92 : 42,368.58 = 7,185.96 : x
  2. Step 2: Convert to fraction form
    28,245.92/42,368.58 = 7,185.96/x
  3. Step 3: Cross multiply
    28,245.92x = 42,368.58 × 7,185.96
  4. Step 4: Simplify right side
    28,245.92x = 304,458,921.14
  5. Step 5: Solve for x
    x = 304,458,921.14/28,245.92
  6. Step 6: Final answer
    x = 10,778.87

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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.