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Finding the Fourth Proportional to 28,228.39, 42,348.08 and 8,505.97

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Solution

The fourth proportional to 28,228.39, 42,348.08 and 8,505.97 is: 12,760.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,228.39 : 42,348.08 = 8,505.97 : x
  2. Step 2: Convert to fraction form
    28,228.39/42,348.08 = 8,505.97/x
  3. Step 3: Cross multiply
    28,228.39x = 42,348.08 × 8,505.97
  4. Step 4: Simplify right side
    28,228.39x = 360,211,455.51
  5. Step 5: Solve for x
    x = 360,211,455.51/28,228.39
  6. Step 6: Final answer
    x = 12,760.61

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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.