Home / 20,639.84-30,929.52-12,824.96

Finding the Fourth Proportional to 20,639.84, 30,929.52 and 12,824.96

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Solution

The fourth proportional to 20,639.84, 30,929.52 and 12,824.96 is: 19,218.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.84 : 30,929.52 = 12,824.96 : x
  2. Step 2: Convert to fraction form
    20,639.84/30,929.52 = 12,824.96/x
  3. Step 3: Cross multiply
    20,639.84x = 30,929.52 × 12,824.96
  4. Step 4: Simplify right side
    20,639.84x = 396,669,856.82
  5. Step 5: Solve for x
    x = 396,669,856.82/20,639.84
  6. Step 6: Final answer
    x = 19,218.65

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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.