Home / 7,218.72-10,821.42-2,600.64

Finding the Fourth Proportional to 7,218.72, 10,821.42 and 2,600.64

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Solution

The fourth proportional to 7,218.72, 10,821.42 and 2,600.64 is: 3,898.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,218.72 : 10,821.42 = 2,600.64 : x
  2. Step 2: Convert to fraction form
    7,218.72/10,821.42 = 2,600.64/x
  3. Step 3: Cross multiply
    7,218.72x = 10,821.42 × 2,600.64
  4. Step 4: Simplify right side
    7,218.72x = 28,142,617.71
  5. Step 5: Solve for x
    x = 28,142,617.71/7,218.72
  6. Step 6: Final answer
    x = 3,898.56

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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.