Home / 6,279.20-9,412.25-2,117.78

Finding the Fourth Proportional to 6,279.20, 9,412.25 and 2,117.78

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Solution

The fourth proportional to 6,279.20, 9,412.25 and 2,117.78 is: 3,174.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,279.20 : 9,412.25 = 2,117.78 : x
  2. Step 2: Convert to fraction form
    6,279.20/9,412.25 = 2,117.78/x
  3. Step 3: Cross multiply
    6,279.20x = 9,412.25 × 2,117.78
  4. Step 4: Simplify right side
    6,279.20x = 19,933,017.15
  5. Step 5: Solve for x
    x = 19,933,017.15/6,279.20
  6. Step 6: Final answer
    x = 3,174.45

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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.