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Finding the Fourth Proportional to 20,569.94, 30,855.01 and 4,987.56

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Solution

The fourth proportional to 20,569.94, 30,855.01 and 4,987.56 is: 7,481.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,569.94 : 30,855.01 = 4,987.56 : x
  2. Step 2: Convert to fraction form
    20,569.94/30,855.01 = 4,987.56/x
  3. Step 3: Cross multiply
    20,569.94x = 30,855.01 × 4,987.56
  4. Step 4: Simplify right side
    20,569.94x = 153,891,213.68
  5. Step 5: Solve for x
    x = 153,891,213.68/20,569.94
  6. Step 6: Final answer
    x = 7,481.36

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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.