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Finding the Fourth Proportional to 39,710.82, 54,798.22 and 21,806.99

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Solution

The fourth proportional to 39,710.82, 54,798.22 and 21,806.99 is: 30,092.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,710.82 : 54,798.22 = 21,806.99 : x
  2. Step 2: Convert to fraction form
    39,710.82/54,798.22 = 21,806.99/x
  3. Step 3: Cross multiply
    39,710.82x = 54,798.22 × 21,806.99
  4. Step 4: Simplify right side
    39,710.82x = 1,194,983,907.05
  5. Step 5: Solve for x
    x = 1,194,983,907.05/39,710.82
  6. Step 6: Final answer
    x = 30,092.15

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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.