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Finding the Fourth Proportional to 12,641.96, 18,964.99 and 4,745.09

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Solution

The fourth proportional to 12,641.96, 18,964.99 and 4,745.09 is: 7,118.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,641.96 : 18,964.99 = 4,745.09 : x
  2. Step 2: Convert to fraction form
    12,641.96/18,964.99 = 4,745.09/x
  3. Step 3: Cross multiply
    12,641.96x = 18,964.99 × 4,745.09
  4. Step 4: Simplify right side
    12,641.96x = 89,990,677.76
  5. Step 5: Solve for x
    x = 89,990,677.76/12,641.96
  6. Step 6: Final answer
    x = 7,118.41

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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.