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Finding the Fourth Proportional to 6,317.76, 8,718.11 and 3,485.15

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Solution

The fourth proportional to 6,317.76, 8,718.11 and 3,485.15 is: 4,809.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,317.76 : 8,718.11 = 3,485.15 : x
  2. Step 2: Convert to fraction form
    6,317.76/8,718.11 = 3,485.15/x
  3. Step 3: Cross multiply
    6,317.76x = 8,718.11 × 3,485.15
  4. Step 4: Simplify right side
    6,317.76x = 30,383,860.05
  5. Step 5: Solve for x
    x = 30,383,860.05/6,317.76
  6. Step 6: Final answer
    x = 4,809.28

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Double 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.