Home / 18,120.40-27,190.10-13,163.72

Finding the Fourth Proportional to 18,120.40, 27,190.10 and 13,163.72

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Solution

The fourth proportional to 18,120.40, 27,190.10 and 13,163.72 is: 19,752.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,120.40 : 27,190.10 = 13,163.72 : x
  2. Step 2: Convert to fraction form
    18,120.40/27,190.10 = 13,163.72/x
  3. Step 3: Cross multiply
    18,120.40x = 27,190.10 × 13,163.72
  4. Step 4: Simplify right side
    18,120.40x = 357,922,661.40
  5. Step 5: Solve for x
    x = 357,922,661.40/18,120.40
  6. Step 6: Final answer
    x = 19,752.47

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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.