Home / 12,629.80-17,440.14-7,922.20

Finding the Fourth Proportional to 12,629.80, 17,440.14 and 7,922.20

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Solution

The fourth proportional to 12,629.80, 17,440.14 and 7,922.20 is: 10,939.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,629.80 : 17,440.14 = 7,922.20 : x
  2. Step 2: Convert to fraction form
    12,629.80/17,440.14 = 7,922.20/x
  3. Step 3: Cross multiply
    12,629.80x = 17,440.14 × 7,922.20
  4. Step 4: Simplify right side
    12,629.80x = 138,164,277.11
  5. Step 5: Solve for x
    x = 138,164,277.11/12,629.80
  6. Step 6: Final answer
    x = 10,939.55

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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.