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Finding the Fourth Proportional to 18,976.26, 28,468.11 and 7,288.58

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Solution

The fourth proportional to 18,976.26, 28,468.11 and 7,288.58 is: 10,934.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,976.26 : 28,468.11 = 7,288.58 : x
  2. Step 2: Convert to fraction form
    18,976.26/28,468.11 = 7,288.58/x
  3. Step 3: Cross multiply
    18,976.26x = 28,468.11 × 7,288.58
  4. Step 4: Simplify right side
    18,976.26x = 207,492,097.18
  5. Step 5: Solve for x
    x = 207,492,097.18/18,976.26
  6. Step 6: Final answer
    x = 10,934.30

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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.