Home / 6,228.40-8,590.34-3,990.49

Finding the Fourth Proportional to 6,228.40, 8,590.34 and 3,990.49

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Solution

The fourth proportional to 6,228.40, 8,590.34 and 3,990.49 is: 5,503.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,228.40 : 8,590.34 = 3,990.49 : x
  2. Step 2: Convert to fraction form
    6,228.40/8,590.34 = 3,990.49/x
  3. Step 3: Cross multiply
    6,228.40x = 8,590.34 × 3,990.49
  4. Step 4: Simplify right side
    6,228.40x = 34,279,624.44
  5. Step 5: Solve for x
    x = 34,279,624.44/6,228.40
  6. Step 6: Final answer
    x = 5,503.76

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Half scale
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Double scale
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Similar ratio
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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.