Home / 2,788.24-3,846-2,123.68

Finding the Fourth Proportional to 2,788.24, 3,846 and 2,123.68

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Solution

The fourth proportional to 2,788.24, 3,846 and 2,123.68 is: 2,929.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,788.24 : 3,846 = 2,123.68 : x
  2. Step 2: Convert to fraction form
    2,788.24/3,846 = 2,123.68/x
  3. Step 3: Cross multiply
    2,788.24x = 3,846 × 2,123.68
  4. Step 4: Simplify right side
    2,788.24x = 8,167,673.28
  5. Step 5: Solve for x
    x = 8,167,673.28/2,788.24
  6. Step 6: Final answer
    x = 2,929.33

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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.