Home / 20,079.54-27,711.35-11,127.90

Finding the Fourth Proportional to 20,079.54, 27,711.35 and 11,127.90

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Solution

The fourth proportional to 20,079.54, 27,711.35 and 11,127.90 is: 15,357.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,079.54 : 27,711.35 = 11,127.90 : x
  2. Step 2: Convert to fraction form
    20,079.54/27,711.35 = 11,127.90/x
  3. Step 3: Cross multiply
    20,079.54x = 27,711.35 × 11,127.90
  4. Step 4: Simplify right side
    20,079.54x = 308,369,076.03
  5. Step 5: Solve for x
    x = 308,369,076.03/20,079.54
  6. Step 6: Final answer
    x = 15,357.38

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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.