Home / 12,428.13-17,144.36-7,704.21

Finding the Fourth Proportional to 12,428.13, 17,144.36 and 7,704.21

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Solution

The fourth proportional to 12,428.13, 17,144.36 and 7,704.21 is: 10,627.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428.13 : 17,144.36 = 7,704.21 : x
  2. Step 2: Convert to fraction form
    12,428.13/17,144.36 = 7,704.21/x
  3. Step 3: Cross multiply
    12,428.13x = 17,144.36 × 7,704.21
  4. Step 4: Simplify right side
    12,428.13x = 132,083,804.42
  5. Step 5: Solve for x
    x = 132,083,804.42/12,428.13
  6. Step 6: Final answer
    x = 10,627.81

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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.