Home / 20,611.11-30,909.33-12,717.84

Finding the Fourth Proportional to 20,611.11, 30,909.33 and 12,717.84

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Solution

The fourth proportional to 20,611.11, 30,909.33 and 12,717.84 is: 19,072.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,611.11 : 30,909.33 = 12,717.84 : x
  2. Step 2: Convert to fraction form
    20,611.11/30,909.33 = 12,717.84/x
  3. Step 3: Cross multiply
    20,611.11x = 30,909.33 × 12,717.84
  4. Step 4: Simplify right side
    20,611.11x = 393,099,913.45
  5. Step 5: Solve for x
    x = 393,099,913.45/20,611.11
  6. Step 6: Final answer
    x = 19,072.23

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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.