Home / 12,786.24-17,649.36-9,642.72

Finding the Fourth Proportional to 12,786.24, 17,649.36 and 9,642.72

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Solution

The fourth proportional to 12,786.24, 17,649.36 and 9,642.72 is: 13,310.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,786.24 : 17,649.36 = 9,642.72 : x
  2. Step 2: Convert to fraction form
    12,786.24/17,649.36 = 9,642.72/x
  3. Step 3: Cross multiply
    12,786.24x = 17,649.36 × 9,642.72
  4. Step 4: Simplify right side
    12,786.24x = 170,187,836.66
  5. Step 5: Solve for x
    x = 170,187,836.66/12,786.24
  6. Step 6: Final answer
    x = 13,310.23

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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.