Home / 7,876.78-11,816.37-2,681.44

Finding the Fourth Proportional to 7,876.78, 11,816.37 and 2,681.44

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Solution

The fourth proportional to 7,876.78, 11,816.37 and 2,681.44 is: 4,022.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,876.78 : 11,816.37 = 2,681.44 : x
  2. Step 2: Convert to fraction form
    7,876.78/11,816.37 = 2,681.44/x
  3. Step 3: Cross multiply
    7,876.78x = 11,816.37 × 2,681.44
  4. Step 4: Simplify right side
    7,876.78x = 31,684,873.77
  5. Step 5: Solve for x
    x = 31,684,873.77/7,876.78
  6. Step 6: Final answer
    x = 4,022.57

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1.5x scale

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.