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Finding the Fourth Proportional to 18,980.39, 28,473.02 and 7,292.09

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Solution

The fourth proportional to 18,980.39, 28,473.02 and 7,292.09 is: 10,939.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,980.39 : 28,473.02 = 7,292.09 : x
  2. Step 2: Convert to fraction form
    18,980.39/28,473.02 = 7,292.09/x
  3. Step 3: Cross multiply
    18,980.39x = 28,473.02 × 7,292.09
  4. Step 4: Simplify right side
    18,980.39x = 207,627,824.41
  5. Step 5: Solve for x
    x = 207,627,824.41/18,980.39
  6. Step 6: Final answer
    x = 10,939.07

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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.