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Finding the Fourth Proportional to 8,762.78, 12,092.14 and 4,985.44

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Solution

The fourth proportional to 8,762.78, 12,092.14 and 4,985.44 is: 6,879.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,762.78 : 12,092.14 = 4,985.44 : x
  2. Step 2: Convert to fraction form
    8,762.78/12,092.14 = 4,985.44/x
  3. Step 3: Cross multiply
    8,762.78x = 12,092.14 × 4,985.44
  4. Step 4: Simplify right side
    8,762.78x = 60,284,638.44
  5. Step 5: Solve for x
    x = 60,284,638.44/8,762.78
  6. Step 6: Final answer
    x = 6,879.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.