Home / 13,261.20-19,891.80-11,122.80

Finding the Fourth Proportional to 13,261.20, 19,891.80 and 11,122.80

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Solution

The fourth proportional to 13,261.20, 19,891.80 and 11,122.80 is: 16,684.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,261.20 : 19,891.80 = 11,122.80 : x
  2. Step 2: Convert to fraction form
    13,261.20/19,891.80 = 11,122.80/x
  3. Step 3: Cross multiply
    13,261.20x = 19,891.80 × 11,122.80
  4. Step 4: Simplify right side
    13,261.20x = 221,252,513.04
  5. Step 5: Solve for x
    x = 221,252,513.04/13,261.20
  6. Step 6: Final answer
    x = 16,684.20

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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.