Home / 20,080.40-27,711.17-11,128.07

Finding the Fourth Proportional to 20,080.40, 27,711.17 and 11,128.07

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Solution

The fourth proportional to 20,080.40, 27,711.17 and 11,128.07 is: 15,356.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,080.40 : 27,711.17 = 11,128.07 : x
  2. Step 2: Convert to fraction form
    20,080.40/27,711.17 = 11,128.07/x
  3. Step 3: Cross multiply
    20,080.40x = 27,711.17 × 11,128.07
  4. Step 4: Simplify right side
    20,080.40x = 308,371,645.35
  5. Step 5: Solve for x
    x = 308,371,645.35/20,080.40
  6. Step 6: Final answer
    x = 15,356.85

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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.