Home / 20,660.42-30,989.52-12,116.62

Finding the Fourth Proportional to 20,660.42, 30,989.52 and 12,116.62

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Solution

The fourth proportional to 20,660.42, 30,989.52 and 12,116.62 is: 18,174.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.42 : 30,989.52 = 12,116.62 : x
  2. Step 2: Convert to fraction form
    20,660.42/30,989.52 = 12,116.62/x
  3. Step 3: Cross multiply
    20,660.42x = 30,989.52 × 12,116.62
  4. Step 4: Simplify right side
    20,660.42x = 375,488,237.82
  5. Step 5: Solve for x
    x = 375,488,237.82/20,660.42
  6. Step 6: Final answer
    x = 18,174.28

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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.