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Finding the Fourth Proportional to 28,918.20, 43,377.30 and 9,198.30

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Solution

The fourth proportional to 28,918.20, 43,377.30 and 9,198.30 is: 13,797.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,918.20 : 43,377.30 = 9,198.30 : x
  2. Step 2: Convert to fraction form
    28,918.20/43,377.30 = 9,198.30/x
  3. Step 3: Cross multiply
    28,918.20x = 43,377.30 × 9,198.30
  4. Step 4: Simplify right side
    28,918.20x = 398,997,418.59
  5. Step 5: Solve for x
    x = 398,997,418.59/28,918.20
  6. Step 6: Final answer
    x = 13,797.45

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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.