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Finding the Fourth Proportional to 18,866.39, 28,300.53 and 7,180.52

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Solution

The fourth proportional to 18,866.39, 28,300.53 and 7,180.52 is: 10,771.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,866.39 : 28,300.53 = 7,180.52 : x
  2. Step 2: Convert to fraction form
    18,866.39/28,300.53 = 7,180.52/x
  3. Step 3: Cross multiply
    18,866.39x = 28,300.53 × 7,180.52
  4. Step 4: Simplify right side
    18,866.39x = 203,212,521.68
  5. Step 5: Solve for x
    x = 203,212,521.68/18,866.39
  6. Step 6: Final answer
    x = 10,771.14

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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.