Home / 21,164.22-29,189.79-13,611.42

Finding the Fourth Proportional to 21,164.22, 29,189.79 and 13,611.42

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Solution

The fourth proportional to 21,164.22, 29,189.79 and 13,611.42 is: 18,772.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,164.22 : 29,189.79 = 13,611.42 : x
  2. Step 2: Convert to fraction form
    21,164.22/29,189.79 = 13,611.42/x
  3. Step 3: Cross multiply
    21,164.22x = 29,189.79 × 13,611.42
  4. Step 4: Simplify right side
    21,164.22x = 397,314,491.40
  5. Step 5: Solve for x
    x = 397,314,491.40/21,164.22
  6. Step 6: Final answer
    x = 18,772.93

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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.