Home / 11,428.40-17,142.97-3,931.88

Finding the Fourth Proportional to 11,428.40, 17,142.97 and 3,931.88

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Solution

The fourth proportional to 11,428.40, 17,142.97 and 3,931.88 is: 5,897.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,428.40 : 17,142.97 = 3,931.88 : x
  2. Step 2: Convert to fraction form
    11,428.40/17,142.97 = 3,931.88/x
  3. Step 3: Cross multiply
    11,428.40x = 17,142.97 × 3,931.88
  4. Step 4: Simplify right side
    11,428.40x = 67,404,100.88
  5. Step 5: Solve for x
    x = 67,404,100.88/11,428.40
  6. Step 6: Final answer
    x = 5,897.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.