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Finding the Fourth Proportional to 12,786, 17,645.40 and 7,197.36

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Solution

The fourth proportional to 12,786, 17,645.40 and 7,197.36 is: 9,932.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,786 : 17,645.40 = 7,197.36 : x
  2. Step 2: Convert to fraction form
    12,786/17,645.40 = 7,197.36/x
  3. Step 3: Cross multiply
    12,786x = 17,645.40 × 7,197.36
  4. Step 4: Simplify right side
    12,786x = 127,000,296.14
  5. Step 5: Solve for x
    x = 127,000,296.14/12,786
  6. Step 6: Final answer
    x = 9,932.76

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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.