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Finding the Fourth Proportional to 20,692.56, 30,983.76 and 14,131.56

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Solution

The fourth proportional to 20,692.56, 30,983.76 and 14,131.56 is: 21,159.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,692.56 : 30,983.76 = 14,131.56 : x
  2. Step 2: Convert to fraction form
    20,692.56/30,983.76 = 14,131.56/x
  3. Step 3: Cross multiply
    20,692.56x = 30,983.76 × 14,131.56
  4. Step 4: Simplify right side
    20,692.56x = 437,848,863.47
  5. Step 5: Solve for x
    x = 437,848,863.47/20,692.56
  6. Step 6: Final answer
    x = 21,159.72

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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.