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Finding the Fourth Proportional to 21,983.67, 33,008.24 and 21,218.22

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Solution

The fourth proportional to 21,983.67, 33,008.24 and 21,218.22 is: 31,858.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,983.67 : 33,008.24 = 21,218.22 : x
  2. Step 2: Convert to fraction form
    21,983.67/33,008.24 = 21,218.22/x
  3. Step 3: Cross multiply
    21,983.67x = 33,008.24 × 21,218.22
  4. Step 4: Simplify right side
    21,983.67x = 700,376,151.18
  5. Step 5: Solve for x
    x = 700,376,151.18/21,983.67
  6. Step 6: Final answer
    x = 31,858.93

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1.5x scale

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.