Home / 5,235.21-7,223.67-3,139.38

Finding the Fourth Proportional to 5,235.21, 7,223.67 and 3,139.38

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Solution

The fourth proportional to 5,235.21, 7,223.67 and 3,139.38 is: 4,331.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,235.21 : 7,223.67 = 3,139.38 : x
  2. Step 2: Convert to fraction form
    5,235.21/7,223.67 = 3,139.38/x
  3. Step 3: Cross multiply
    5,235.21x = 7,223.67 × 3,139.38
  4. Step 4: Simplify right side
    5,235.21x = 22,677,845.12
  5. Step 5: Solve for x
    x = 22,677,845.12/5,235.21
  6. Step 6: Final answer
    x = 4,331.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.