Home / 7,112.64-9,815.56-3,926.09

Finding the Fourth Proportional to 7,112.64, 9,815.56 and 3,926.09

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Solution

The fourth proportional to 7,112.64, 9,815.56 and 3,926.09 is: 5,418.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,112.64 : 9,815.56 = 3,926.09 : x
  2. Step 2: Convert to fraction form
    7,112.64/9,815.56 = 3,926.09/x
  3. Step 3: Cross multiply
    7,112.64x = 9,815.56 × 3,926.09
  4. Step 4: Simplify right side
    7,112.64x = 38,536,771.96
  5. Step 5: Solve for x
    x = 38,536,771.96/7,112.64
  6. Step 6: Final answer
    x = 5,418.07

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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.