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Finding the Fourth Proportional to 12,145.14, 18,220.14 and 4,354.56

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Solution

The fourth proportional to 12,145.14, 18,220.14 and 4,354.56 is: 6,532.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,145.14 : 18,220.14 = 4,354.56 : x
  2. Step 2: Convert to fraction form
    12,145.14/18,220.14 = 4,354.56/x
  3. Step 3: Cross multiply
    12,145.14x = 18,220.14 × 4,354.56
  4. Step 4: Simplify right side
    12,145.14x = 79,340,692.84
  5. Step 5: Solve for x
    x = 79,340,692.84/12,145.14
  6. Step 6: Final answer
    x = 6,532.71

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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.