Home / 20,972.85-28,943.21-12,022.04

Finding the Fourth Proportional to 20,972.85, 28,943.21 and 12,022.04

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Solution

The fourth proportional to 20,972.85, 28,943.21 and 12,022.04 is: 16,590.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.85 : 28,943.21 = 12,022.04 : x
  2. Step 2: Convert to fraction form
    20,972.85/28,943.21 = 12,022.04/x
  3. Step 3: Cross multiply
    20,972.85x = 28,943.21 × 12,022.04
  4. Step 4: Simplify right side
    20,972.85x = 347,956,463.14
  5. Step 5: Solve for x
    x = 347,956,463.14/20,972.85
  6. Step 6: Final answer
    x = 16,590.81

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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.