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Finding the Fourth Proportional to 47,959.11, 71,938.56 and 12,898.80

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Solution

The fourth proportional to 47,959.11, 71,938.56 and 12,898.80 is: 19,348.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,959.11 : 71,938.56 = 12,898.80 : x
  2. Step 2: Convert to fraction form
    47,959.11/71,938.56 = 12,898.80/x
  3. Step 3: Cross multiply
    47,959.11x = 71,938.56 × 12,898.80
  4. Step 4: Simplify right side
    47,959.11x = 927,921,146.10
  5. Step 5: Solve for x
    x = 927,921,146.10/47,959.11
  6. Step 6: Final answer
    x = 19,348.17

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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.