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Finding the Fourth Proportional to 47,491.25, 71,210.57 and 19,431

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Solution

The fourth proportional to 47,491.25, 71,210.57 and 19,431 is: 29,135.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,491.25 : 71,210.57 = 19,431 : x
  2. Step 2: Convert to fraction form
    47,491.25/71,210.57 = 19,431/x
  3. Step 3: Cross multiply
    47,491.25x = 71,210.57 × 19,431
  4. Step 4: Simplify right side
    47,491.25x = 1,383,692,488.52
  5. Step 5: Solve for x
    x = 1,383,692,488.52/47,491.25
  6. Step 6: Final answer
    x = 29,135.74

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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.