Home / 20,934.60-28,881.57-11,977.31

Finding the Fourth Proportional to 20,934.60, 28,881.57 and 11,977.31

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Solution

The fourth proportional to 20,934.60, 28,881.57 and 11,977.31 is: 16,524.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,934.60 : 28,881.57 = 11,977.31 : x
  2. Step 2: Convert to fraction form
    20,934.60/28,881.57 = 11,977.31/x
  3. Step 3: Cross multiply
    20,934.60x = 28,881.57 × 11,977.31
  4. Step 4: Simplify right side
    20,934.60x = 345,923,517.18
  5. Step 5: Solve for x
    x = 345,923,517.18/20,934.60
  6. Step 6: Final answer
    x = 16,524.01

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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.