Home / 21,282.39-31,885.61-12,958.11

Finding the Fourth Proportional to 21,282.39, 31,885.61 and 12,958.11

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Solution

The fourth proportional to 21,282.39, 31,885.61 and 12,958.11 is: 19,414.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,282.39 : 31,885.61 = 12,958.11 : x
  2. Step 2: Convert to fraction form
    21,282.39/31,885.61 = 12,958.11/x
  3. Step 3: Cross multiply
    21,282.39x = 31,885.61 × 12,958.11
  4. Step 4: Simplify right side
    21,282.39x = 413,177,114.76
  5. Step 5: Solve for x
    x = 413,177,114.76/21,282.39
  6. Step 6: Final answer
    x = 19,414.04

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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.