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Finding the Fourth Proportional to 6,385.70, 8,813.10 and 3,591.20

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Solution

The fourth proportional to 6,385.70, 8,813.10 and 3,591.20 is: 4,956.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,385.70 : 8,813.10 = 3,591.20 : x
  2. Step 2: Convert to fraction form
    6,385.70/8,813.10 = 3,591.20/x
  3. Step 3: Cross multiply
    6,385.70x = 8,813.10 × 3,591.20
  4. Step 4: Simplify right side
    6,385.70x = 31,649,560.65
  5. Step 5: Solve for x
    x = 31,649,560.65/6,385.70
  6. Step 6: Final answer
    x = 4,956.32

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Half scale
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Double scale
Find fourth proportional to 6,386.70, 8,814.48 and 3,592.20
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.