Home / 6,712.80-9,263.40-3,879.72

Finding the Fourth Proportional to 6,712.80, 9,263.40 and 3,879.72

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Solution

The fourth proportional to 6,712.80, 9,263.40 and 3,879.72 is: 5,353.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,712.80 : 9,263.40 = 3,879.72 : x
  2. Step 2: Convert to fraction form
    6,712.80/9,263.40 = 3,879.72/x
  3. Step 3: Cross multiply
    6,712.80x = 9,263.40 × 3,879.72
  4. Step 4: Simplify right side
    6,712.80x = 35,939,398.25
  5. Step 5: Solve for x
    x = 35,939,398.25/6,712.80
  6. Step 6: Final answer
    x = 5,353.86

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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.