Home / 21,220.50-31,834.18-7,181.38

Finding the Fourth Proportional to 21,220.50, 31,834.18 and 7,181.38

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Solution

The fourth proportional to 21,220.50, 31,834.18 and 7,181.38 is: 10,773.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,220.50 : 31,834.18 = 7,181.38 : x
  2. Step 2: Convert to fraction form
    21,220.50/31,834.18 = 7,181.38/x
  3. Step 3: Cross multiply
    21,220.50x = 31,834.18 × 7,181.38
  4. Step 4: Simplify right side
    21,220.50x = 228,613,343.57
  5. Step 5: Solve for x
    x = 228,613,343.57/21,220.50
  6. Step 6: Final answer
    x = 10,773.23

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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.