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Finding the Fourth Proportional to 20,361.88, 30,552 and 12,964.42

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Solution

The fourth proportional to 20,361.88, 30,552 and 12,964.42 is: 19,452.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,361.88 : 30,552 = 12,964.42 : x
  2. Step 2: Convert to fraction form
    20,361.88/30,552 = 12,964.42/x
  3. Step 3: Cross multiply
    20,361.88x = 30,552 × 12,964.42
  4. Step 4: Simplify right side
    20,361.88x = 396,088,959.84
  5. Step 5: Solve for x
    x = 396,088,959.84/20,361.88
  6. Step 6: Final answer
    x = 19,452.47

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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.