Home / 6,415.20-8,853.60-3,896.76

Finding the Fourth Proportional to 6,415.20, 8,853.60 and 3,896.76

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Solution

The fourth proportional to 6,415.20, 8,853.60 and 3,896.76 is: 5,377.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,415.20 : 8,853.60 = 3,896.76 : x
  2. Step 2: Convert to fraction form
    6,415.20/8,853.60 = 3,896.76/x
  3. Step 3: Cross multiply
    6,415.20x = 8,853.60 × 3,896.76
  4. Step 4: Simplify right side
    6,415.20x = 34,500,354.34
  5. Step 5: Solve for x
    x = 34,500,354.34/6,415.20
  6. Step 6: Final answer
    x = 5,377.91

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Half scale
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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.