Home / 20,730.26-28,611.46-12,231.86

Finding the Fourth Proportional to 20,730.26, 28,611.46 and 12,231.86

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Solution

The fourth proportional to 20,730.26, 28,611.46 and 12,231.86 is: 16,882.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.26 : 28,611.46 = 12,231.86 : x
  2. Step 2: Convert to fraction form
    20,730.26/28,611.46 = 12,231.86/x
  3. Step 3: Cross multiply
    20,730.26x = 28,611.46 × 12,231.86
  4. Step 4: Simplify right side
    20,730.26x = 349,971,373.12
  5. Step 5: Solve for x
    x = 349,971,373.12/20,730.26
  6. Step 6: Final answer
    x = 16,882.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.