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Finding the Fourth Proportional to 12,910.66, 17,798.70 and 8,654.30

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Solution

The fourth proportional to 12,910.66, 17,798.70 and 8,654.30 is: 11,930.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,910.66 : 17,798.70 = 8,654.30 : x
  2. Step 2: Convert to fraction form
    12,910.66/17,798.70 = 8,654.30/x
  3. Step 3: Cross multiply
    12,910.66x = 17,798.70 × 8,654.30
  4. Step 4: Simplify right side
    12,910.66x = 154,035,289.41
  5. Step 5: Solve for x
    x = 154,035,289.41/12,910.66
  6. Step 6: Final answer
    x = 11,930.86

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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.