Home / 12,742.85-19,099.85-6,489.65

Finding the Fourth Proportional to 12,742.85, 19,099.85 and 6,489.65

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Solution

The fourth proportional to 12,742.85, 19,099.85 and 6,489.65 is: 9,727.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,742.85 : 19,099.85 = 6,489.65 : x
  2. Step 2: Convert to fraction form
    12,742.85/19,099.85 = 6,489.65/x
  3. Step 3: Cross multiply
    12,742.85x = 19,099.85 × 6,489.65
  4. Step 4: Simplify right side
    12,742.85x = 123,951,213.61
  5. Step 5: Solve for x
    x = 123,951,213.61/12,742.85
  6. Step 6: Final answer
    x = 9,727.12

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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.