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Finding the Fourth Proportional to 6,874.28, 9,486.38 and 3,890.06

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Solution

The fourth proportional to 6,874.28, 9,486.38 and 3,890.06 is: 5,368.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,874.28 : 9,486.38 = 3,890.06 : x
  2. Step 2: Convert to fraction form
    6,874.28/9,486.38 = 3,890.06/x
  3. Step 3: Cross multiply
    6,874.28x = 9,486.38 × 3,890.06
  4. Step 4: Simplify right side
    6,874.28x = 36,902,567.93
  5. Step 5: Solve for x
    x = 36,902,567.93/6,874.28
  6. Step 6: Final answer
    x = 5,368.21

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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.