Home / 21,171.35-31,745.67-7,126.71

Finding the Fourth Proportional to 21,171.35, 31,745.67 and 7,126.71

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Solution

The fourth proportional to 21,171.35, 31,745.67 and 7,126.71 is: 10,686.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,171.35 : 31,745.67 = 7,126.71 : x
  2. Step 2: Convert to fraction form
    21,171.35/31,745.67 = 7,126.71/x
  3. Step 3: Cross multiply
    21,171.35x = 31,745.67 × 7,126.71
  4. Step 4: Simplify right side
    21,171.35x = 226,242,183.85
  5. Step 5: Solve for x
    x = 226,242,183.85/21,171.35
  6. Step 6: Final answer
    x = 10,686.25

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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.