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Finding the Fourth Proportional to 8,610.66, 12,905.06 and 4,717.80

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Solution

The fourth proportional to 8,610.66, 12,905.06 and 4,717.80 is: 7,070.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,610.66 : 12,905.06 = 4,717.80 : x
  2. Step 2: Convert to fraction form
    8,610.66/12,905.06 = 4,717.80/x
  3. Step 3: Cross multiply
    8,610.66x = 12,905.06 × 4,717.80
  4. Step 4: Simplify right side
    8,610.66x = 60,883,468.48
  5. Step 5: Solve for x
    x = 60,883,468.48/8,610.66
  6. Step 6: Final answer
    x = 7,070.71

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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.