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Finding the Fourth Proportional to 6,651.75, 9,979.32 and 1,971.93

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Solution

The fourth proportional to 6,651.75, 9,979.32 and 1,971.93 is: 2,958.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,651.75 : 9,979.32 = 1,971.93 : x
  2. Step 2: Convert to fraction form
    6,651.75/9,979.32 = 1,971.93/x
  3. Step 3: Cross multiply
    6,651.75x = 9,979.32 × 1,971.93
  4. Step 4: Simplify right side
    6,651.75x = 19,678,520.49
  5. Step 5: Solve for x
    x = 19,678,520.49/6,651.75
  6. Step 6: Final answer
    x = 2,958.40

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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.