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Finding the Fourth Proportional to 13,692.62, 18,896.02 and 8,385.50

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Solution

The fourth proportional to 13,692.62, 18,896.02 and 8,385.50 is: 11,572.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,692.62 : 18,896.02 = 8,385.50 : x
  2. Step 2: Convert to fraction form
    13,692.62/18,896.02 = 8,385.50/x
  3. Step 3: Cross multiply
    13,692.62x = 18,896.02 × 8,385.50
  4. Step 4: Simplify right side
    13,692.62x = 158,452,575.71
  5. Step 5: Solve for x
    x = 158,452,575.71/13,692.62
  6. Step 6: Final answer
    x = 11,572.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.