Home / 20,961.46-31,432.47-12,198.88

Finding the Fourth Proportional to 20,961.46, 31,432.47 and 12,198.88

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Solution

The fourth proportional to 20,961.46, 31,432.47 and 12,198.88 is: 18,292.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.46 : 31,432.47 = 12,198.88 : x
  2. Step 2: Convert to fraction form
    20,961.46/31,432.47 = 12,198.88/x
  3. Step 3: Cross multiply
    20,961.46x = 31,432.47 × 12,198.88
  4. Step 4: Simplify right side
    20,961.46x = 383,440,929.63
  5. Step 5: Solve for x
    x = 383,440,929.63/20,961.46
  6. Step 6: Final answer
    x = 18,292.66

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1.5x scale

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.