Home / 21,936-32,919.12-19,011.36

Finding the Fourth Proportional to 21,936, 32,919.12 and 19,011.36

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Solution

The fourth proportional to 21,936, 32,919.12 and 19,011.36 is: 28,530.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,936 : 32,919.12 = 19,011.36 : x
  2. Step 2: Convert to fraction form
    21,936/32,919.12 = 19,011.36/x
  3. Step 3: Cross multiply
    21,936x = 32,919.12 × 19,011.36
  4. Step 4: Simplify right side
    21,936x = 625,837,241.20
  5. Step 5: Solve for x
    x = 625,837,241.20/21,936
  6. Step 6: Final answer
    x = 28,530.14

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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.