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Finding the Fourth Proportional to 28,473.26, 42,710.09 and 11,815.20

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Solution

The fourth proportional to 28,473.26, 42,710.09 and 11,815.20 is: 17,722.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,473.26 : 42,710.09 = 11,815.20 : x
  2. Step 2: Convert to fraction form
    28,473.26/42,710.09 = 11,815.20/x
  3. Step 3: Cross multiply
    28,473.26x = 42,710.09 × 11,815.20
  4. Step 4: Simplify right side
    28,473.26x = 504,628,196.29
  5. Step 5: Solve for x
    x = 504,628,196.29/28,473.26
  6. Step 6: Final answer
    x = 17,722.88

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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.