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Finding the Fourth Proportional to 15,766.12, 21,755.52 and 8,692.12

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Solution

The fourth proportional to 15,766.12, 21,755.52 and 8,692.12 is: 11,994.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,766.12 : 21,755.52 = 8,692.12 : x
  2. Step 2: Convert to fraction form
    15,766.12/21,755.52 = 8,692.12/x
  3. Step 3: Cross multiply
    15,766.12x = 21,755.52 × 8,692.12
  4. Step 4: Simplify right side
    15,766.12x = 189,101,590.50
  5. Step 5: Solve for x
    x = 189,101,590.50/15,766.12
  6. Step 6: Final answer
    x = 11,994.17

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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.