Home / 5,123.45-7,688.17-2,161.72

Finding the Fourth Proportional to 5,123.45, 7,688.17 and 2,161.72

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Solution

The fourth proportional to 5,123.45, 7,688.17 and 2,161.72 is: 3,243.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,123.45 : 7,688.17 = 2,161.72 : x
  2. Step 2: Convert to fraction form
    5,123.45/7,688.17 = 2,161.72/x
  3. Step 3: Cross multiply
    5,123.45x = 7,688.17 × 2,161.72
  4. Step 4: Simplify right side
    5,123.45x = 16,619,632.41
  5. Step 5: Solve for x
    x = 16,619,632.41/5,123.45
  6. Step 6: Final answer
    x = 3,243.84

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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.