Home / 20,753.70-31,130.55-5,171.33

Finding the Fourth Proportional to 20,753.70, 31,130.55 and 5,171.33

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Solution

The fourth proportional to 20,753.70, 31,130.55 and 5,171.33 is: 7,756.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,753.70 : 31,130.55 = 5,171.33 : x
  2. Step 2: Convert to fraction form
    20,753.70/31,130.55 = 5,171.33/x
  3. Step 3: Cross multiply
    20,753.70x = 31,130.55 × 5,171.33
  4. Step 4: Simplify right side
    20,753.70x = 160,986,191.48
  5. Step 5: Solve for x
    x = 160,986,191.48/20,753.70
  6. Step 6: Final answer
    x = 7,756.99

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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.