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Finding the Fourth Proportional to 31,651.40, 47,447.40 and 11,943.20

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Solution

The fourth proportional to 31,651.40, 47,447.40 and 11,943.20 is: 17,903.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,651.40 : 47,447.40 = 11,943.20 : x
  2. Step 2: Convert to fraction form
    31,651.40/47,447.40 = 11,943.20/x
  3. Step 3: Cross multiply
    31,651.40x = 47,447.40 × 11,943.20
  4. Step 4: Simplify right side
    31,651.40x = 566,673,787.68
  5. Step 5: Solve for x
    x = 566,673,787.68/31,651.40
  6. Step 6: Final answer
    x = 17,903.59

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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.