Home / 20,455.05-30,679.15-5,665.46

Finding the Fourth Proportional to 20,455.05, 30,679.15 and 5,665.46

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Solution

The fourth proportional to 20,455.05, 30,679.15 and 5,665.46 is: 8,497.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,455.05 : 30,679.15 = 5,665.46 : x
  2. Step 2: Convert to fraction form
    20,455.05/30,679.15 = 5,665.46/x
  3. Step 3: Cross multiply
    20,455.05x = 30,679.15 × 5,665.46
  4. Step 4: Simplify right side
    20,455.05x = 173,811,497.16
  5. Step 5: Solve for x
    x = 173,811,497.16/20,455.05
  6. Step 6: Final answer
    x = 8,497.24

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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.