Home / 20,933.53-28,881.12-12,972.85

Finding the Fourth Proportional to 20,933.53, 28,881.12 and 12,972.85

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Solution

The fourth proportional to 20,933.53, 28,881.12 and 12,972.85 is: 17,898.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,933.53 : 28,881.12 = 12,972.85 : x
  2. Step 2: Convert to fraction form
    20,933.53/28,881.12 = 12,972.85/x
  3. Step 3: Cross multiply
    20,933.53x = 28,881.12 × 12,972.85
  4. Step 4: Simplify right side
    20,933.53x = 374,670,414.04
  5. Step 5: Solve for x
    x = 374,670,414.04/20,933.53
  6. Step 6: Final answer
    x = 17,898.10

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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.