Home / 5,213.40-7,821.32-1,515.71

Finding the Fourth Proportional to 5,213.40, 7,821.32 and 1,515.71

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Solution

The fourth proportional to 5,213.40, 7,821.32 and 1,515.71 is: 2,273.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,213.40 : 7,821.32 = 1,515.71 : x
  2. Step 2: Convert to fraction form
    5,213.40/7,821.32 = 1,515.71/x
  3. Step 3: Cross multiply
    5,213.40x = 7,821.32 × 1,515.71
  4. Step 4: Simplify right side
    5,213.40x = 11,854,806.25
  5. Step 5: Solve for x
    x = 11,854,806.25/5,213.40
  6. Step 6: Final answer
    x = 2,273.91

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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.