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Finding the Fourth Proportional to 6,638.70, 9,958.02 and 3,165.42

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Solution

The fourth proportional to 6,638.70, 9,958.02 and 3,165.42 is: 4,748.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,638.70 : 9,958.02 = 3,165.42 : x
  2. Step 2: Convert to fraction form
    6,638.70/9,958.02 = 3,165.42/x
  3. Step 3: Cross multiply
    6,638.70x = 9,958.02 × 3,165.42
  4. Step 4: Simplify right side
    6,638.70x = 31,521,315.67
  5. Step 5: Solve for x
    x = 31,521,315.67/6,638.70
  6. Step 6: Final answer
    x = 4,748.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.