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Finding the Fourth Proportional to 20,374.47, 30,561.71 and 5,583.47

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Solution

The fourth proportional to 20,374.47, 30,561.71 and 5,583.47 is: 8,375.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,374.47 : 30,561.71 = 5,583.47 : x
  2. Step 2: Convert to fraction form
    20,374.47/30,561.71 = 5,583.47/x
  3. Step 3: Cross multiply
    20,374.47x = 30,561.71 × 5,583.47
  4. Step 4: Simplify right side
    20,374.47x = 170,640,210.21
  5. Step 5: Solve for x
    x = 170,640,210.21/20,374.47
  6. Step 6: Final answer
    x = 8,375.20

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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.