Home / 5,218-7,821.73-2,615.47

Finding the Fourth Proportional to 5,218, 7,821.73 and 2,615.47

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Solution

The fourth proportional to 5,218, 7,821.73 and 2,615.47 is: 3,920.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,218 : 7,821.73 = 2,615.47 : x
  2. Step 2: Convert to fraction form
    5,218/7,821.73 = 2,615.47/x
  3. Step 3: Cross multiply
    5,218x = 7,821.73 × 2,615.47
  4. Step 4: Simplify right side
    5,218x = 20,457,500.16
  5. Step 5: Solve for x
    x = 20,457,500.16/5,218
  6. Step 6: Final answer
    x = 3,920.56

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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.