Home / 20,515.43-30,778.34-5,724.35

Finding the Fourth Proportional to 20,515.43, 30,778.34 and 5,724.35

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Solution

The fourth proportional to 20,515.43, 30,778.34 and 5,724.35 is: 8,587.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.43 : 30,778.34 = 5,724.35 : x
  2. Step 2: Convert to fraction form
    20,515.43/30,778.34 = 5,724.35/x
  3. Step 3: Cross multiply
    20,515.43x = 30,778.34 × 5,724.35
  4. Step 4: Simplify right side
    20,515.43x = 176,185,836.69
  5. Step 5: Solve for x
    x = 176,185,836.69/20,515.43
  6. Step 6: Final answer
    x = 8,587.97

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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.