Home / 20,862.35-31,289.78-5,865.86

Finding the Fourth Proportional to 20,862.35, 31,289.78 and 5,865.86

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Solution

The fourth proportional to 20,862.35, 31,289.78 and 5,865.86 is: 8,797.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862.35 : 31,289.78 = 5,865.86 : x
  2. Step 2: Convert to fraction form
    20,862.35/31,289.78 = 5,865.86/x
  3. Step 3: Cross multiply
    20,862.35x = 31,289.78 × 5,865.86
  4. Step 4: Simplify right side
    20,862.35x = 183,541,517.81
  5. Step 5: Solve for x
    x = 183,541,517.81/20,862.35
  6. Step 6: Final answer
    x = 8,797.74

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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.