Home / 2,161.45-2,983.08-1,321.99

Finding the Fourth Proportional to 2,161.45, 2,983.08 and 1,321.99

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Solution

The fourth proportional to 2,161.45, 2,983.08 and 1,321.99 is: 1,824.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,161.45 : 2,983.08 = 1,321.99 : x
  2. Step 2: Convert to fraction form
    2,161.45/2,983.08 = 1,321.99/x
  3. Step 3: Cross multiply
    2,161.45x = 2,983.08 × 1,321.99
  4. Step 4: Simplify right side
    2,161.45x = 3,943,601.93
  5. Step 5: Solve for x
    x = 3,943,601.93/2,161.45
  6. Step 6: Final answer
    x = 1,824.52

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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.