Home / 13,563.97-18,720.49-8,112.68

Finding the Fourth Proportional to 13,563.97, 18,720.49 and 8,112.68

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Solution

The fourth proportional to 13,563.97, 18,720.49 and 8,112.68 is: 11,196.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,563.97 : 18,720.49 = 8,112.68 : x
  2. Step 2: Convert to fraction form
    13,563.97/18,720.49 = 8,112.68/x
  3. Step 3: Cross multiply
    13,563.97x = 18,720.49 × 8,112.68
  4. Step 4: Simplify right side
    13,563.97x = 151,873,344.81
  5. Step 5: Solve for x
    x = 151,873,344.81/13,563.97
  6. Step 6: Final answer
    x = 11,196.82

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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.