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Finding the Fourth Proportional to 18,692.40, 28,033.80 and 5,541.69

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Solution

The fourth proportional to 18,692.40, 28,033.80 and 5,541.69 is: 8,311.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,692.40 : 28,033.80 = 5,541.69 : x
  2. Step 2: Convert to fraction form
    18,692.40/28,033.80 = 5,541.69/x
  3. Step 3: Cross multiply
    18,692.40x = 28,033.80 × 5,541.69
  4. Step 4: Simplify right side
    18,692.40x = 155,354,629.12
  5. Step 5: Solve for x
    x = 155,354,629.12/18,692.40
  6. Step 6: Final answer
    x = 8,311.11

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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.