Home / 19,997.81-29,997.21-5,207.39

Finding the Fourth Proportional to 19,997.81, 29,997.21 and 5,207.39

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Solution

The fourth proportional to 19,997.81, 29,997.21 and 5,207.39 is: 7,811.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,997.81 : 29,997.21 = 5,207.39 : x
  2. Step 2: Convert to fraction form
    19,997.81/29,997.21 = 5,207.39/x
  3. Step 3: Cross multiply
    19,997.81x = 29,997.21 × 5,207.39
  4. Step 4: Simplify right side
    19,997.81x = 156,207,171.38
  5. Step 5: Solve for x
    x = 156,207,171.38/19,997.81
  6. Step 6: Final answer
    x = 7,811.21

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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.