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Finding the Fourth Proportional to 12,643.72, 18,964.14 and 3,410.44

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Solution

The fourth proportional to 12,643.72, 18,964.14 and 3,410.44 is: 5,115.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,643.72 : 18,964.14 = 3,410.44 : x
  2. Step 2: Convert to fraction form
    12,643.72/18,964.14 = 3,410.44/x
  3. Step 3: Cross multiply
    12,643.72x = 18,964.14 × 3,410.44
  4. Step 4: Simplify right side
    12,643.72x = 64,676,061.62
  5. Step 5: Solve for x
    x = 64,676,061.62/12,643.72
  6. Step 6: Final answer
    x = 5,115.27

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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.