Home / 20,300.11-27,984.35-13,129.48

Finding the Fourth Proportional to 20,300.11, 27,984.35 and 13,129.48

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Solution

The fourth proportional to 20,300.11, 27,984.35 and 13,129.48 is: 18,099.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,300.11 : 27,984.35 = 13,129.48 : x
  2. Step 2: Convert to fraction form
    20,300.11/27,984.35 = 13,129.48/x
  3. Step 3: Cross multiply
    20,300.11x = 27,984.35 × 13,129.48
  4. Step 4: Simplify right side
    20,300.11x = 367,419,963.64
  5. Step 5: Solve for x
    x = 367,419,963.64/20,300.11
  6. Step 6: Final answer
    x = 18,099.41

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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.