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Finding the Fourth Proportional to 6,874.70, 9,486.59 and 3,890.86

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Solution

The fourth proportional to 6,874.70, 9,486.59 and 3,890.86 is: 5,369.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,874.70 : 9,486.59 = 3,890.86 : x
  2. Step 2: Convert to fraction form
    6,874.70/9,486.59 = 3,890.86/x
  3. Step 3: Cross multiply
    6,874.70x = 9,486.59 × 3,890.86
  4. Step 4: Simplify right side
    6,874.70x = 36,910,950.40
  5. Step 5: Solve for x
    x = 36,910,950.40/6,874.70
  6. Step 6: Final answer
    x = 5,369.10

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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.