Home / 21,228.68-31,848.42-12,470.96

Finding the Fourth Proportional to 21,228.68, 31,848.42 and 12,470.96

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Solution

The fourth proportional to 21,228.68, 31,848.42 and 12,470.96 is: 18,709.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,228.68 : 31,848.42 = 12,470.96 : x
  2. Step 2: Convert to fraction form
    21,228.68/31,848.42 = 12,470.96/x
  3. Step 3: Cross multiply
    21,228.68x = 31,848.42 × 12,470.96
  4. Step 4: Simplify right side
    21,228.68x = 397,180,371.88
  5. Step 5: Solve for x
    x = 397,180,371.88/21,228.68
  6. Step 6: Final answer
    x = 18,709.61

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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.