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Finding the Fourth Proportional to 18,692.53, 28,007.05 and 11,281.42

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Solution

The fourth proportional to 18,692.53, 28,007.05 and 11,281.42 is: 16,902.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,692.53 : 28,007.05 = 11,281.42 : x
  2. Step 2: Convert to fraction form
    18,692.53/28,007.05 = 11,281.42/x
  3. Step 3: Cross multiply
    18,692.53x = 28,007.05 × 11,281.42
  4. Step 4: Simplify right side
    18,692.53x = 315,959,294.01
  5. Step 5: Solve for x
    x = 315,959,294.01/18,692.53
  6. Step 6: Final answer
    x = 16,902.97

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1.5x scale

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.