Home / 20,695.40-31,046.52-8,215.50

Finding the Fourth Proportional to 20,695.40, 31,046.52 and 8,215.50

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Solution

The fourth proportional to 20,695.40, 31,046.52 and 8,215.50 is: 12,324.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,695.40 : 31,046.52 = 8,215.50 : x
  2. Step 2: Convert to fraction form
    20,695.40/31,046.52 = 8,215.50/x
  3. Step 3: Cross multiply
    20,695.40x = 31,046.52 × 8,215.50
  4. Step 4: Simplify right side
    20,695.40x = 255,062,685.06
  5. Step 5: Solve for x
    x = 255,062,685.06/20,695.40
  6. Step 6: Final answer
    x = 12,324.61

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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.