Home / 21,298.78-31,961.94-9,611.38

Finding the Fourth Proportional to 21,298.78, 31,961.94 and 9,611.38

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Solution

The fourth proportional to 21,298.78, 31,961.94 and 9,611.38 is: 14,423.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,298.78 : 31,961.94 = 9,611.38 : x
  2. Step 2: Convert to fraction form
    21,298.78/31,961.94 = 9,611.38/x
  3. Step 3: Cross multiply
    21,298.78x = 31,961.94 × 9,611.38
  4. Step 4: Simplify right side
    21,298.78x = 307,198,350.88
  5. Step 5: Solve for x
    x = 307,198,350.88/21,298.78
  6. Step 6: Final answer
    x = 14,423.28

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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.