Home / 3,123.66-4,308.99-2,115.39

Finding the Fourth Proportional to 3,123.66, 4,308.99 and 2,115.39

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Solution

The fourth proportional to 3,123.66, 4,308.99 and 2,115.39 is: 2,918.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.66 : 4,308.99 = 2,115.39 : x
  2. Step 2: Convert to fraction form
    3,123.66/4,308.99 = 2,115.39/x
  3. Step 3: Cross multiply
    3,123.66x = 4,308.99 × 2,115.39
  4. Step 4: Simplify right side
    3,123.66x = 9,115,194.36
  5. Step 5: Solve for x
    x = 9,115,194.36/3,123.66
  6. Step 6: Final answer
    x = 2,918.11

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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.