Home / 20,705.07-31,057.23-5,122.69

Finding the Fourth Proportional to 20,705.07, 31,057.23 and 5,122.69

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Solution

The fourth proportional to 20,705.07, 31,057.23 and 5,122.69 is: 7,683.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.07 : 31,057.23 = 5,122.69 : x
  2. Step 2: Convert to fraction form
    20,705.07/31,057.23 = 5,122.69/x
  3. Step 3: Cross multiply
    20,705.07x = 31,057.23 × 5,122.69
  4. Step 4: Simplify right side
    20,705.07x = 159,096,561.55
  5. Step 5: Solve for x
    x = 159,096,561.55/20,705.07
  6. Step 6: Final answer
    x = 7,683.94

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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.