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Finding the Fourth Proportional to 8,679.69, 11,977.95 and 4,902.66

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Solution

The fourth proportional to 8,679.69, 11,977.95 and 4,902.66 is: 6,765.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.69 : 11,977.95 = 4,902.66 : x
  2. Step 2: Convert to fraction form
    8,679.69/11,977.95 = 4,902.66/x
  3. Step 3: Cross multiply
    8,679.69x = 11,977.95 × 4,902.66
  4. Step 4: Simplify right side
    8,679.69x = 58,723,816.35
  5. Step 5: Solve for x
    x = 58,723,816.35/8,679.69
  6. Step 6: Final answer
    x = 6,765.66

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1.5x scale

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.