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Finding the Fourth Proportional to 12,680.36, 17,498.88 and 7,091.36

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Solution

The fourth proportional to 12,680.36, 17,498.88 and 7,091.36 is: 9,786.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,680.36 : 17,498.88 = 7,091.36 : x
  2. Step 2: Convert to fraction form
    12,680.36/17,498.88 = 7,091.36/x
  3. Step 3: Cross multiply
    12,680.36x = 17,498.88 × 7,091.36
  4. Step 4: Simplify right side
    12,680.36x = 124,090,857.68
  5. Step 5: Solve for x
    x = 124,090,857.68/12,680.36
  6. Step 6: Final answer
    x = 9,786.07

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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.