Home / 20,078.88-27,709.92-11,127.36

Finding the Fourth Proportional to 20,078.88, 27,709.92 and 11,127.36

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Solution

The fourth proportional to 20,078.88, 27,709.92 and 11,127.36 is: 15,356.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.88 : 27,709.92 = 11,127.36 : x
  2. Step 2: Convert to fraction form
    20,078.88/27,709.92 = 11,127.36/x
  3. Step 3: Cross multiply
    20,078.88x = 27,709.92 × 11,127.36
  4. Step 4: Simplify right side
    20,078.88x = 308,338,255.41
  5. Step 5: Solve for x
    x = 308,338,255.41/20,078.88
  6. Step 6: Final answer
    x = 15,356.35

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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.