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Finding the Fourth Proportional to 6,388.80, 8,814.09 and 4,714.20

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Solution

The fourth proportional to 6,388.80, 8,814.09 and 4,714.20 is: 6,503.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,388.80 : 8,814.09 = 4,714.20 : x
  2. Step 2: Convert to fraction form
    6,388.80/8,814.09 = 4,714.20/x
  3. Step 3: Cross multiply
    6,388.80x = 8,814.09 × 4,714.20
  4. Step 4: Simplify right side
    6,388.80x = 41,551,383.08
  5. Step 5: Solve for x
    x = 41,551,383.08/6,388.80
  6. Step 6: Final answer
    x = 6,503.79

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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.