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Finding the Fourth Proportional to 20,468.40, 30,692.52 and 6,615.60

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Solution

The fourth proportional to 20,468.40, 30,692.52 and 6,615.60 is: 9,920.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,468.40 : 30,692.52 = 6,615.60 : x
  2. Step 2: Convert to fraction form
    20,468.40/30,692.52 = 6,615.60/x
  3. Step 3: Cross multiply
    20,468.40x = 30,692.52 × 6,615.60
  4. Step 4: Simplify right side
    20,468.40x = 203,049,435.31
  5. Step 5: Solve for x
    x = 203,049,435.31/20,468.40
  6. Step 6: Final answer
    x = 9,920.14

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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.