Home / 20,151.75-27,821.81-12,994.03

Finding the Fourth Proportional to 20,151.75, 27,821.81 and 12,994.03

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Solution

The fourth proportional to 20,151.75, 27,821.81 and 12,994.03 is: 17,939.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,151.75 : 27,821.81 = 12,994.03 : x
  2. Step 2: Convert to fraction form
    20,151.75/27,821.81 = 12,994.03/x
  3. Step 3: Cross multiply
    20,151.75x = 27,821.81 × 12,994.03
  4. Step 4: Simplify right side
    20,151.75x = 361,517,433.79
  5. Step 5: Solve for x
    x = 361,517,433.79/20,151.75
  6. Step 6: Final answer
    x = 17,939.75

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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.