Home / 13,189.80-19,689.36-11,220.96

Finding the Fourth Proportional to 13,189.80, 19,689.36 and 11,220.96

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Solution

The fourth proportional to 13,189.80, 19,689.36 and 11,220.96 is: 16,750.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,189.80 : 19,689.36 = 11,220.96 : x
  2. Step 2: Convert to fraction form
    13,189.80/19,689.36 = 11,220.96/x
  3. Step 3: Cross multiply
    13,189.80x = 19,689.36 × 11,220.96
  4. Step 4: Simplify right side
    13,189.80x = 220,933,520.99
  5. Step 5: Solve for x
    x = 220,933,520.99/13,189.80
  6. Step 6: Final answer
    x = 16,750.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.