Home / 20,361.38-28,100.32-11,979.50

Finding the Fourth Proportional to 20,361.38, 28,100.32 and 11,979.50

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Solution

The fourth proportional to 20,361.38, 28,100.32 and 11,979.50 is: 16,532.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,361.38 : 28,100.32 = 11,979.50 : x
  2. Step 2: Convert to fraction form
    20,361.38/28,100.32 = 11,979.50/x
  3. Step 3: Cross multiply
    20,361.38x = 28,100.32 × 11,979.50
  4. Step 4: Simplify right side
    20,361.38x = 336,627,612.99
  5. Step 5: Solve for x
    x = 336,627,612.99/20,361.38
  6. Step 6: Final answer
    x = 16,532.66

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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.