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Finding the Fourth Proportional to 6,315, 8,714.88 and 3,520.68

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Solution

The fourth proportional to 6,315, 8,714.88 and 3,520.68 is: 4,858.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,315 : 8,714.88 = 3,520.68 : x
  2. Step 2: Convert to fraction form
    6,315/8,714.88 = 3,520.68/x
  3. Step 3: Cross multiply
    6,315x = 8,714.88 × 3,520.68
  4. Step 4: Simplify right side
    6,315x = 30,682,303.72
  5. Step 5: Solve for x
    x = 30,682,303.72/6,315
  6. Step 6: Final answer
    x = 4,858.64

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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.