Home / 20,731.60-31,072.80-11,948.37

Finding the Fourth Proportional to 20,731.60, 31,072.80 and 11,948.37

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Solution

The fourth proportional to 20,731.60, 31,072.80 and 11,948.37 is: 17,908.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.60 : 31,072.80 = 11,948.37 : x
  2. Step 2: Convert to fraction form
    20,731.60/31,072.80 = 11,948.37/x
  3. Step 3: Cross multiply
    20,731.60x = 31,072.80 × 11,948.37
  4. Step 4: Simplify right side
    20,731.60x = 371,269,172.41
  5. Step 5: Solve for x
    x = 371,269,172.41/20,731.60
  6. Step 6: Final answer
    x = 17,908.37

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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.