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Finding the Fourth Proportional to 20,578.08, 30,853.08 and 9,898.81

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Solution

The fourth proportional to 20,578.08, 30,853.08 and 9,898.81 is: 14,841.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,578.08 : 30,853.08 = 9,898.81 : x
  2. Step 2: Convert to fraction form
    20,578.08/30,853.08 = 9,898.81/x
  3. Step 3: Cross multiply
    20,578.08x = 30,853.08 × 9,898.81
  4. Step 4: Simplify right side
    20,578.08x = 305,408,699.70
  5. Step 5: Solve for x
    x = 305,408,699.70/20,578.08
  6. Step 6: Final answer
    x = 14,841.45

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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.