Home / 20,132.79-27,784.49-11,180.36

Finding the Fourth Proportional to 20,132.79, 27,784.49 and 11,180.36

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Solution

The fourth proportional to 20,132.79, 27,784.49 and 11,180.36 is: 15,429.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,132.79 : 27,784.49 = 11,180.36 : x
  2. Step 2: Convert to fraction form
    20,132.79/27,784.49 = 11,180.36/x
  3. Step 3: Cross multiply
    20,132.79x = 27,784.49 × 11,180.36
  4. Step 4: Simplify right side
    20,132.79x = 310,640,405.79
  5. Step 5: Solve for x
    x = 310,640,405.79/20,132.79
  6. Step 6: Final answer
    x = 15,429.58

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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.