Home / 20,922.34-31,380.63-5,339.02

Finding the Fourth Proportional to 20,922.34, 31,380.63 and 5,339.02

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Solution

The fourth proportional to 20,922.34, 31,380.63 and 5,339.02 is: 8,007.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.34 : 31,380.63 = 5,339.02 : x
  2. Step 2: Convert to fraction form
    20,922.34/31,380.63 = 5,339.02/x
  3. Step 3: Cross multiply
    20,922.34x = 31,380.63 × 5,339.02
  4. Step 4: Simplify right side
    20,922.34x = 167,541,811.18
  5. Step 5: Solve for x
    x = 167,541,811.18/20,922.34
  6. Step 6: Final answer
    x = 8,007.80

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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.