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Finding the Fourth Proportional to 12,491.68, 18,744.72 and 6,944.56

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Solution

The fourth proportional to 12,491.68, 18,744.72 and 6,944.56 is: 10,420.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.68 : 18,744.72 = 6,944.56 : x
  2. Step 2: Convert to fraction form
    12,491.68/18,744.72 = 6,944.56/x
  3. Step 3: Cross multiply
    12,491.68x = 18,744.72 × 6,944.56
  4. Step 4: Simplify right side
    12,491.68x = 130,173,832.72
  5. Step 5: Solve for x
    x = 130,173,832.72/12,491.68
  6. Step 6: Final answer
    x = 10,420.84

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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.