Home / 21,272.44-31,884.12-18,812.08

Finding the Fourth Proportional to 21,272.44, 31,884.12 and 18,812.08

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Solution

The fourth proportional to 21,272.44, 31,884.12 and 18,812.08 is: 28,196.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,272.44 : 31,884.12 = 18,812.08 : x
  2. Step 2: Convert to fraction form
    21,272.44/31,884.12 = 18,812.08/x
  3. Step 3: Cross multiply
    21,272.44x = 31,884.12 × 18,812.08
  4. Step 4: Simplify right side
    21,272.44x = 599,806,616.17
  5. Step 5: Solve for x
    x = 599,806,616.17/21,272.44
  6. Step 6: Final answer
    x = 28,196.42

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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.