Home / 7,981.78-11,967.78-3,046.12

Finding the Fourth Proportional to 7,981.78, 11,967.78 and 3,046.12

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Solution

The fourth proportional to 7,981.78, 11,967.78 and 3,046.12 is: 4,567.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.78 : 11,967.78 = 3,046.12 : x
  2. Step 2: Convert to fraction form
    7,981.78/11,967.78 = 3,046.12/x
  3. Step 3: Cross multiply
    7,981.78x = 11,967.78 × 3,046.12
  4. Step 4: Simplify right side
    7,981.78x = 36,455,294.01
  5. Step 5: Solve for x
    x = 36,455,294.01/7,981.78
  6. Step 6: Final answer
    x = 4,567.31

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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.