Home / 21,190.12-29,245.02-12,692.20

Finding the Fourth Proportional to 21,190.12, 29,245.02 and 12,692.20

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Solution

The fourth proportional to 21,190.12, 29,245.02 and 12,692.20 is: 17,516.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,190.12 : 29,245.02 = 12,692.20 : x
  2. Step 2: Convert to fraction form
    21,190.12/29,245.02 = 12,692.20/x
  3. Step 3: Cross multiply
    21,190.12x = 29,245.02 × 12,692.20
  4. Step 4: Simplify right side
    21,190.12x = 371,183,642.84
  5. Step 5: Solve for x
    x = 371,183,642.84/21,190.12
  6. Step 6: Final answer
    x = 17,516.83

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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.