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Finding the Fourth Proportional to 28,936.80, 43,404.12 and 9,214.80

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Solution

The fourth proportional to 28,936.80, 43,404.12 and 9,214.80 is: 13,821.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,936.80 : 43,404.12 = 9,214.80 : x
  2. Step 2: Convert to fraction form
    28,936.80/43,404.12 = 9,214.80/x
  3. Step 3: Cross multiply
    28,936.80x = 43,404.12 × 9,214.80
  4. Step 4: Simplify right side
    28,936.80x = 399,960,284.98
  5. Step 5: Solve for x
    x = 399,960,284.98/28,936.80
  6. Step 6: Final answer
    x = 13,821.86

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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.