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Finding the Fourth Proportional to 8,616, 11,890.08 and 4,890

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Solution

The fourth proportional to 8,616, 11,890.08 and 4,890 is: 6,748.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,616 : 11,890.08 = 4,890 : x
  2. Step 2: Convert to fraction form
    8,616/11,890.08 = 4,890/x
  3. Step 3: Cross multiply
    8,616x = 11,890.08 × 4,890
  4. Step 4: Simplify right side
    8,616x = 58,142,491.20
  5. Step 5: Solve for x
    x = 58,142,491.20/8,616
  6. Step 6: Final answer
    x = 6,748.20

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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.