Home / 12,480.16-17,222.56-6,891.12

Finding the Fourth Proportional to 12,480.16, 17,222.56 and 6,891.12

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Solution

The fourth proportional to 12,480.16, 17,222.56 and 6,891.12 is: 9,509.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480.16 : 17,222.56 = 6,891.12 : x
  2. Step 2: Convert to fraction form
    12,480.16/17,222.56 = 6,891.12/x
  3. Step 3: Cross multiply
    12,480.16x = 17,222.56 × 6,891.12
  4. Step 4: Simplify right side
    12,480.16x = 118,682,727.67
  5. Step 5: Solve for x
    x = 118,682,727.67/12,480.16
  6. Step 6: Final answer
    x = 9,509.71

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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.