Home / 12,428-17,150.76-6,839.12

Finding the Fourth Proportional to 12,428, 17,150.76 and 6,839.12

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Solution

The fourth proportional to 12,428, 17,150.76 and 6,839.12 is: 9,438.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428 : 17,150.76 = 6,839.12 : x
  2. Step 2: Convert to fraction form
    12,428/17,150.76 = 6,839.12/x
  3. Step 3: Cross multiply
    12,428x = 17,150.76 × 6,839.12
  4. Step 4: Simplify right side
    12,428x = 117,296,105.73
  5. Step 5: Solve for x
    x = 117,296,105.73/12,428
  6. Step 6: Final answer
    x = 9,438.05

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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.