Home / 20,455.71-30,684.26-5,664.79

Finding the Fourth Proportional to 20,455.71, 30,684.26 and 5,664.79

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Solution

The fourth proportional to 20,455.71, 30,684.26 and 5,664.79 is: 8,497.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,455.71 : 30,684.26 = 5,664.79 : x
  2. Step 2: Convert to fraction form
    20,455.71/30,684.26 = 5,664.79/x
  3. Step 3: Cross multiply
    20,455.71x = 30,684.26 × 5,664.79
  4. Step 4: Simplify right side
    20,455.71x = 173,819,889.21
  5. Step 5: Solve for x
    x = 173,819,889.21/20,455.71
  6. Step 6: Final answer
    x = 8,497.38

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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.