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Finding the Fourth Proportional to 28,918.80, 43,377.12 and 9,196.80

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Solution

The fourth proportional to 28,918.80, 43,377.12 and 9,196.80 is: 13,794.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,918.80 : 43,377.12 = 9,196.80 : x
  2. Step 2: Convert to fraction form
    28,918.80/43,377.12 = 9,196.80/x
  3. Step 3: Cross multiply
    28,918.80x = 43,377.12 × 9,196.80
  4. Step 4: Simplify right side
    28,918.80x = 398,930,697.22
  5. Step 5: Solve for x
    x = 398,930,697.22/28,918.80
  6. Step 6: Final answer
    x = 13,794.86

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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.