Home / 20,080.39-27,711.01-11,128.05

Finding the Fourth Proportional to 20,080.39, 27,711.01 and 11,128.05

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Solution

The fourth proportional to 20,080.39, 27,711.01 and 11,128.05 is: 15,356.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,080.39 : 27,711.01 = 11,128.05 : x
  2. Step 2: Convert to fraction form
    20,080.39/27,711.01 = 11,128.05/x
  3. Step 3: Cross multiply
    20,080.39x = 27,711.01 × 11,128.05
  4. Step 4: Simplify right side
    20,080.39x = 308,369,504.83
  5. Step 5: Solve for x
    x = 308,369,504.83/20,080.39
  6. Step 6: Final answer
    x = 15,356.75

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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.