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Finding the Fourth Proportional to 6,399.70, 8,830.04 and 3,605.20

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Solution

The fourth proportional to 6,399.70, 8,830.04 and 3,605.20 is: 4,974.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,399.70 : 8,830.04 = 3,605.20 : x
  2. Step 2: Convert to fraction form
    6,399.70/8,830.04 = 3,605.20/x
  3. Step 3: Cross multiply
    6,399.70x = 8,830.04 × 3,605.20
  4. Step 4: Simplify right side
    6,399.70x = 31,834,060.21
  5. Step 5: Solve for x
    x = 31,834,060.21/6,399.70
  6. Step 6: Final answer
    x = 4,974.31

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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.