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Finding the Fourth Proportional to 12,692.18, 17,520.12 and 11,363.60

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Solution

The fourth proportional to 12,692.18, 17,520.12 and 11,363.60 is: 15,686.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,692.18 : 17,520.12 = 11,363.60 : x
  2. Step 2: Convert to fraction form
    12,692.18/17,520.12 = 11,363.60/x
  3. Step 3: Cross multiply
    12,692.18x = 17,520.12 × 11,363.60
  4. Step 4: Simplify right side
    12,692.18x = 199,091,635.63
  5. Step 5: Solve for x
    x = 199,091,635.63/12,692.18
  6. Step 6: Final answer
    x = 15,686.17

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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.