Home / 20,361.66-28,102.59-11,979.78

Finding the Fourth Proportional to 20,361.66, 28,102.59 and 11,979.78

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Solution

The fourth proportional to 20,361.66, 28,102.59 and 11,979.78 is: 16,534.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,361.66 : 28,102.59 = 11,979.78 : x
  2. Step 2: Convert to fraction form
    20,361.66/28,102.59 = 11,979.78/x
  3. Step 3: Cross multiply
    20,361.66x = 28,102.59 × 11,979.78
  4. Step 4: Simplify right side
    20,361.66x = 336,662,845.63
  5. Step 5: Solve for x
    x = 336,662,845.63/20,361.66
  6. Step 6: Final answer
    x = 16,534.16

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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.