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Finding the Fourth Proportional to 18,706.47, 28,059.65 and 7,610.54

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Solution

The fourth proportional to 18,706.47, 28,059.65 and 7,610.54 is: 11,415.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,706.47 : 28,059.65 = 7,610.54 : x
  2. Step 2: Convert to fraction form
    18,706.47/28,059.65 = 7,610.54/x
  3. Step 3: Cross multiply
    18,706.47x = 28,059.65 × 7,610.54
  4. Step 4: Simplify right side
    18,706.47x = 213,548,938.90
  5. Step 5: Solve for x
    x = 213,548,938.90/18,706.47
  6. Step 6: Final answer
    x = 11,415.78

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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.