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Finding the Fourth Proportional to 6,388.70, 8,809.11 and 4,499.64

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Solution

The fourth proportional to 6,388.70, 8,809.11 and 4,499.64 is: 6,204.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,388.70 : 8,809.11 = 4,499.64 : x
  2. Step 2: Convert to fraction form
    6,388.70/8,809.11 = 4,499.64/x
  3. Step 3: Cross multiply
    6,388.70x = 8,809.11 × 4,499.64
  4. Step 4: Simplify right side
    6,388.70x = 39,637,823.72
  5. Step 5: Solve for x
    x = 39,637,823.72/6,388.70
  6. Step 6: Final answer
    x = 6,204.37

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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.