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Finding the Fourth Proportional to 6,399.21, 8,828.40 and 4,008.19

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Solution

The fourth proportional to 6,399.21, 8,828.40 and 4,008.19 is: 5,529.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,399.21 : 8,828.40 = 4,008.19 : x
  2. Step 2: Convert to fraction form
    6,399.21/8,828.40 = 4,008.19/x
  3. Step 3: Cross multiply
    6,399.21x = 8,828.40 × 4,008.19
  4. Step 4: Simplify right side
    6,399.21x = 35,385,904.60
  5. Step 5: Solve for x
    x = 35,385,904.60/6,399.21
  6. Step 6: Final answer
    x = 5,529.73

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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.