Home / 13,443.88-18,550.20-9,198.40

Finding the Fourth Proportional to 13,443.88, 18,550.20 and 9,198.40

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Solution

The fourth proportional to 13,443.88, 18,550.20 and 9,198.40 is: 12,692.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,443.88 : 18,550.20 = 9,198.40 : x
  2. Step 2: Convert to fraction form
    13,443.88/18,550.20 = 9,198.40/x
  3. Step 3: Cross multiply
    13,443.88x = 18,550.20 × 9,198.40
  4. Step 4: Simplify right side
    13,443.88x = 170,632,159.68
  5. Step 5: Solve for x
    x = 170,632,159.68/13,443.88
  6. Step 6: Final answer
    x = 12,692.18

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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.