Home / 5,139.36-7,726.12-4,221.72

Finding the Fourth Proportional to 5,139.36, 7,726.12 and 4,221.72

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Solution

The fourth proportional to 5,139.36, 7,726.12 and 4,221.72 is: 6,346.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.36 : 7,726.12 = 4,221.72 : x
  2. Step 2: Convert to fraction form
    5,139.36/7,726.12 = 4,221.72/x
  3. Step 3: Cross multiply
    5,139.36x = 7,726.12 × 4,221.72
  4. Step 4: Simplify right side
    5,139.36x = 32,617,515.33
  5. Step 5: Solve for x
    x = 32,617,515.33/5,139.36
  6. Step 6: Final answer
    x = 6,346.61

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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.