Home / 13,446.15-18,550.80-8,139.03

Finding the Fourth Proportional to 13,446.15, 18,550.80 and 8,139.03

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Solution

The fourth proportional to 13,446.15, 18,550.80 and 8,139.03 is: 11,228.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,446.15 : 18,550.80 = 8,139.03 : x
  2. Step 2: Convert to fraction form
    13,446.15/18,550.80 = 8,139.03/x
  3. Step 3: Cross multiply
    13,446.15x = 18,550.80 × 8,139.03
  4. Step 4: Simplify right side
    13,446.15x = 150,985,517.72
  5. Step 5: Solve for x
    x = 150,985,517.72/13,446.15
  6. Step 6: Final answer
    x = 11,228.90

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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.