Home / 21,631.20-29,857.44-12,680.64

Finding the Fourth Proportional to 21,631.20, 29,857.44 and 12,680.64

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Solution

The fourth proportional to 21,631.20, 29,857.44 and 12,680.64 is: 17,503.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,631.20 : 29,857.44 = 12,680.64 : x
  2. Step 2: Convert to fraction form
    21,631.20/29,857.44 = 12,680.64/x
  3. Step 3: Cross multiply
    21,631.20x = 29,857.44 × 12,680.64
  4. Step 4: Simplify right side
    21,631.20x = 378,611,447.96
  5. Step 5: Solve for x
    x = 378,611,447.96/21,631.20
  6. Step 6: Final answer
    x = 17,503.03

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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.