Home / 7,874.12-11,818.46-3,981.28

Finding the Fourth Proportional to 7,874.12, 11,818.46 and 3,981.28

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Solution

The fourth proportional to 7,874.12, 11,818.46 and 3,981.28 is: 5,975.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,874.12 : 11,818.46 = 3,981.28 : x
  2. Step 2: Convert to fraction form
    7,874.12/11,818.46 = 3,981.28/x
  3. Step 3: Cross multiply
    7,874.12x = 11,818.46 × 3,981.28
  4. Step 4: Simplify right side
    7,874.12x = 47,052,598.43
  5. Step 5: Solve for x
    x = 47,052,598.43/7,874.12
  6. Step 6: Final answer
    x = 5,975.60

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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.