Home / 20,861.46-31,282.47-12,098.88

Finding the Fourth Proportional to 20,861.46, 31,282.47 and 12,098.88

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Solution

The fourth proportional to 20,861.46, 31,282.47 and 12,098.88 is: 18,142.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861.46 : 31,282.47 = 12,098.88 : x
  2. Step 2: Convert to fraction form
    20,861.46/31,282.47 = 12,098.88/x
  3. Step 3: Cross multiply
    20,861.46x = 31,282.47 × 12,098.88
  4. Step 4: Simplify right side
    20,861.46x = 378,482,850.63
  5. Step 5: Solve for x
    x = 378,482,850.63/20,861.46
  6. Step 6: Final answer
    x = 18,142.68

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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.