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Finding the Fourth Proportional to 43,805.17, 65,692.95 and 13,819.15

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Solution

The fourth proportional to 43,805.17, 65,692.95 and 13,819.15 is: 20,724.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,805.17 : 65,692.95 = 13,819.15 : x
  2. Step 2: Convert to fraction form
    43,805.17/65,692.95 = 13,819.15/x
  3. Step 3: Cross multiply
    43,805.17x = 65,692.95 × 13,819.15
  4. Step 4: Simplify right side
    43,805.17x = 907,820,729.99
  5. Step 5: Solve for x
    x = 907,820,729.99/43,805.17
  6. Step 6: Final answer
    x = 20,724.05

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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.