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Finding the Fourth Proportional to 28,612.26, 42,918.42 and 8,890.84

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Solution

The fourth proportional to 28,612.26, 42,918.42 and 8,890.84 is: 13,336.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,612.26 : 42,918.42 = 8,890.84 : x
  2. Step 2: Convert to fraction form
    28,612.26/42,918.42 = 8,890.84/x
  3. Step 3: Cross multiply
    28,612.26x = 42,918.42 × 8,890.84
  4. Step 4: Simplify right side
    28,612.26x = 381,580,805.27
  5. Step 5: Solve for x
    x = 381,580,805.27/28,612.26
  6. Step 6: Final answer
    x = 13,336.27

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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.