Home / 20,856.43-31,265.20-7,705.27

Finding the Fourth Proportional to 20,856.43, 31,265.20 and 7,705.27

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Solution

The fourth proportional to 20,856.43, 31,265.20 and 7,705.27 is: 11,550.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.43 : 31,265.20 = 7,705.27 : x
  2. Step 2: Convert to fraction form
    20,856.43/31,265.20 = 7,705.27/x
  3. Step 3: Cross multiply
    20,856.43x = 31,265.20 × 7,705.27
  4. Step 4: Simplify right side
    20,856.43x = 240,906,807.60
  5. Step 5: Solve for x
    x = 240,906,807.60/20,856.43
  6. Step 6: Final answer
    x = 11,550.72

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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.