Home / 12,786.68-17,645.57-7,121.50

Finding the Fourth Proportional to 12,786.68, 17,645.57 and 7,121.50

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Solution

The fourth proportional to 12,786.68, 17,645.57 and 7,121.50 is: 9,827.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,786.68 : 17,645.57 = 7,121.50 : x
  2. Step 2: Convert to fraction form
    12,786.68/17,645.57 = 7,121.50/x
  3. Step 3: Cross multiply
    12,786.68x = 17,645.57 × 7,121.50
  4. Step 4: Simplify right side
    12,786.68x = 125,662,900.44
  5. Step 5: Solve for x
    x = 125,662,900.44/12,786.68
  6. Step 6: Final answer
    x = 9,827.64

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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.