Home / 20,157.42-27,829.70-12,989.88

Finding the Fourth Proportional to 20,157.42, 27,829.70 and 12,989.88

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Solution

The fourth proportional to 20,157.42, 27,829.70 and 12,989.88 is: 17,934.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,157.42 : 27,829.70 = 12,989.88 : x
  2. Step 2: Convert to fraction form
    20,157.42/27,829.70 = 12,989.88/x
  3. Step 3: Cross multiply
    20,157.42x = 27,829.70 × 12,989.88
  4. Step 4: Simplify right side
    20,157.42x = 361,504,463.44
  5. Step 5: Solve for x
    x = 361,504,463.44/20,157.42
  6. Step 6: Final answer
    x = 17,934.06

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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.