Home / 13,638.77-20,476.38-13,195.90

Finding the Fourth Proportional to 13,638.77, 20,476.38 and 13,195.90

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Solution

The fourth proportional to 13,638.77, 20,476.38 and 13,195.90 is: 19,811.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.77 : 20,476.38 = 13,195.90 : x
  2. Step 2: Convert to fraction form
    13,638.77/20,476.38 = 13,195.90/x
  3. Step 3: Cross multiply
    13,638.77x = 20,476.38 × 13,195.90
  4. Step 4: Simplify right side
    13,638.77x = 270,204,262.84
  5. Step 5: Solve for x
    x = 270,204,262.84/13,638.77
  6. Step 6: Final answer
    x = 19,811.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.