Home / 2,135.62-2,945.98-1,338.77

Finding the Fourth Proportional to 2,135.62, 2,945.98 and 1,338.77

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Solution

The fourth proportional to 2,135.62, 2,945.98 and 1,338.77 is: 1,846.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.62 : 2,945.98 = 1,338.77 : x
  2. Step 2: Convert to fraction form
    2,135.62/2,945.98 = 1,338.77/x
  3. Step 3: Cross multiply
    2,135.62x = 2,945.98 × 1,338.77
  4. Step 4: Simplify right side
    2,135.62x = 3,943,989.64
  5. Step 5: Solve for x
    x = 3,943,989.64/2,135.62
  6. Step 6: Final answer
    x = 1,846.77

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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.