Home / 21,217.29-31,824.72-7,172.57

Finding the Fourth Proportional to 21,217.29, 31,824.72 and 7,172.57

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Solution

The fourth proportional to 21,217.29, 31,824.72 and 7,172.57 is: 10,758.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,217.29 : 31,824.72 = 7,172.57 : x
  2. Step 2: Convert to fraction form
    21,217.29/31,824.72 = 7,172.57/x
  3. Step 3: Cross multiply
    21,217.29x = 31,824.72 × 7,172.57
  4. Step 4: Simplify right side
    21,217.29x = 228,264,872.81
  5. Step 5: Solve for x
    x = 228,264,872.81/21,217.29
  6. Step 6: Final answer
    x = 10,758.44

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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.