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Finding the Fourth Proportional to 12,617.45, 17,393.87 and 8,828.88

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Solution

The fourth proportional to 12,617.45, 17,393.87 and 8,828.88 is: 12,171.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,617.45 : 17,393.87 = 8,828.88 : x
  2. Step 2: Convert to fraction form
    12,617.45/17,393.87 = 8,828.88/x
  3. Step 3: Cross multiply
    12,617.45x = 17,393.87 × 8,828.88
  4. Step 4: Simplify right side
    12,617.45x = 153,568,346.82
  5. Step 5: Solve for x
    x = 153,568,346.82/12,617.45
  6. Step 6: Final answer
    x = 12,171.11

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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.