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Finding the Fourth Proportional to 20,498.84, 30,748.28 and 5,707.79

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Solution

The fourth proportional to 20,498.84, 30,748.28 and 5,707.79 is: 8,561.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,498.84 : 30,748.28 = 5,707.79 : x
  2. Step 2: Convert to fraction form
    20,498.84/30,748.28 = 5,707.79/x
  3. Step 3: Cross multiply
    20,498.84x = 30,748.28 × 5,707.79
  4. Step 4: Simplify right side
    20,498.84x = 175,504,542.82
  5. Step 5: Solve for x
    x = 175,504,542.82/20,498.84
  6. Step 6: Final answer
    x = 8,561.68

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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.