Home / 21,936.20-30,269.93-13,434.44

Finding the Fourth Proportional to 21,936.20, 30,269.93 and 13,434.44

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Solution

The fourth proportional to 21,936.20, 30,269.93 and 13,434.44 is: 18,538.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,936.20 : 30,269.93 = 13,434.44 : x
  2. Step 2: Convert to fraction form
    21,936.20/30,269.93 = 13,434.44/x
  3. Step 3: Cross multiply
    21,936.20x = 30,269.93 × 13,434.44
  4. Step 4: Simplify right side
    21,936.20x = 406,659,516.30
  5. Step 5: Solve for x
    x = 406,659,516.30/21,936.20
  6. Step 6: Final answer
    x = 18,538.29

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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.