Home / 21,310.52-31,970.39-8,162.88

Finding the Fourth Proportional to 21,310.52, 31,970.39 and 8,162.88

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Solution

The fourth proportional to 21,310.52, 31,970.39 and 8,162.88 is: 12,246.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,310.52 : 31,970.39 = 8,162.88 : x
  2. Step 2: Convert to fraction form
    21,310.52/31,970.39 = 8,162.88/x
  3. Step 3: Cross multiply
    21,310.52x = 31,970.39 × 8,162.88
  4. Step 4: Simplify right side
    21,310.52x = 260,970,416.31
  5. Step 5: Solve for x
    x = 260,970,416.31/21,310.52
  6. Step 6: Final answer
    x = 12,246.09

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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.