Home / 13,163.40-18,161.26-9,387.20

Finding the Fourth Proportional to 13,163.40, 18,161.26 and 9,387.20

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Solution

The fourth proportional to 13,163.40, 18,161.26 and 9,387.20 is: 12,951.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,163.40 : 18,161.26 = 9,387.20 : x
  2. Step 2: Convert to fraction form
    13,163.40/18,161.26 = 9,387.20/x
  3. Step 3: Cross multiply
    13,163.40x = 18,161.26 × 9,387.20
  4. Step 4: Simplify right side
    13,163.40x = 170,483,379.87
  5. Step 5: Solve for x
    x = 170,483,379.87/13,163.40
  6. Step 6: Final answer
    x = 12,951.32

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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.