Home / 7,120.47-10,679.10-2,121.81

Finding the Fourth Proportional to 7,120.47, 10,679.10 and 2,121.81

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Solution

The fourth proportional to 7,120.47, 10,679.10 and 2,121.81 is: 3,182.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.47 : 10,679.10 = 2,121.81 : x
  2. Step 2: Convert to fraction form
    7,120.47/10,679.10 = 2,121.81/x
  3. Step 3: Cross multiply
    7,120.47x = 10,679.10 × 2,121.81
  4. Step 4: Simplify right side
    7,120.47x = 22,659,021.17
  5. Step 5: Solve for x
    x = 22,659,021.17/7,120.47
  6. Step 6: Final answer
    x = 3,182.24

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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.