Home / 21,305.32-31,956.84-8,156.68

Finding the Fourth Proportional to 21,305.32, 31,956.84 and 8,156.68

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Solution

The fourth proportional to 21,305.32, 31,956.84 and 8,156.68 is: 12,234.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,305.32 : 31,956.84 = 8,156.68 : x
  2. Step 2: Convert to fraction form
    21,305.32/31,956.84 = 8,156.68/x
  3. Step 3: Cross multiply
    21,305.32x = 31,956.84 × 8,156.68
  4. Step 4: Simplify right side
    21,305.32x = 260,661,717.69
  5. Step 5: Solve for x
    x = 260,661,717.69/21,305.32
  6. Step 6: Final answer
    x = 12,234.58

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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.