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Finding the Fourth Proportional to 12,640.88, 18,964.05 and 3,875.56

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Solution

The fourth proportional to 12,640.88, 18,964.05 and 3,875.56 is: 5,814.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.88 : 18,964.05 = 3,875.56 : x
  2. Step 2: Convert to fraction form
    12,640.88/18,964.05 = 3,875.56/x
  3. Step 3: Cross multiply
    12,640.88x = 18,964.05 × 3,875.56
  4. Step 4: Simplify right side
    12,640.88x = 73,496,313.62
  5. Step 5: Solve for x
    x = 73,496,313.62/12,640.88
  6. Step 6: Final answer
    x = 5,814.18

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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.