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Finding the Fourth Proportional to 18,876.48, 28,318.14 and 7,777

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Solution

The fourth proportional to 18,876.48, 28,318.14 and 7,777 is: 11,666.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,876.48 : 28,318.14 = 7,777 : x
  2. Step 2: Convert to fraction form
    18,876.48/28,318.14 = 7,777/x
  3. Step 3: Cross multiply
    18,876.48x = 28,318.14 × 7,777
  4. Step 4: Simplify right side
    18,876.48x = 220,230,174.78
  5. Step 5: Solve for x
    x = 220,230,174.78/18,876.48
  6. Step 6: Final answer
    x = 11,666.91

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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.