Home / 7,143.20-10,716.51-2,980.89

Finding the Fourth Proportional to 7,143.20, 10,716.51 and 2,980.89

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Solution

The fourth proportional to 7,143.20, 10,716.51 and 2,980.89 is: 4,472.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,143.20 : 10,716.51 = 2,980.89 : x
  2. Step 2: Convert to fraction form
    7,143.20/10,716.51 = 2,980.89/x
  3. Step 3: Cross multiply
    7,143.20x = 10,716.51 × 2,980.89
  4. Step 4: Simplify right side
    7,143.20x = 31,944,737.49
  5. Step 5: Solve for x
    x = 31,944,737.49/7,143.20
  6. Step 6: Final answer
    x = 4,472.05

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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.