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Finding the Fourth Proportional to 47,679.64, 71,542.52 and 19,620.40

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Solution

The fourth proportional to 47,679.64, 71,542.52 and 19,620.40 is: 29,440.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,679.64 : 71,542.52 = 19,620.40 : x
  2. Step 2: Convert to fraction form
    47,679.64/71,542.52 = 19,620.40/x
  3. Step 3: Cross multiply
    47,679.64x = 71,542.52 × 19,620.40
  4. Step 4: Simplify right side
    47,679.64x = 1,403,692,859.41
  5. Step 5: Solve for x
    x = 1,403,692,859.41/47,679.64
  6. Step 6: Final answer
    x = 29,440.09

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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.