Home / 13,611.30-18,781.20-7,643.22

Finding the Fourth Proportional to 13,611.30, 18,781.20 and 7,643.22

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Solution

The fourth proportional to 13,611.30, 18,781.20 and 7,643.22 is: 10,546.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611.30 : 18,781.20 = 7,643.22 : x
  2. Step 2: Convert to fraction form
    13,611.30/18,781.20 = 7,643.22/x
  3. Step 3: Cross multiply
    13,611.30x = 18,781.20 × 7,643.22
  4. Step 4: Simplify right side
    13,611.30x = 143,548,843.46
  5. Step 5: Solve for x
    x = 143,548,843.46/13,611.30
  6. Step 6: Final answer
    x = 10,546.30

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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.