Home / 3,890.35-5,368.71-2,122.00

Finding the Fourth Proportional to 3,890.35, 5,368.71 and 2,122.00

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Solution

The fourth proportional to 3,890.35, 5,368.71 and 2,122.00 is: 2,928.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.35 : 5,368.71 = 2,122.00 : x
  2. Step 2: Convert to fraction form
    3,890.35/5,368.71 = 2,122.00/x
  3. Step 3: Cross multiply
    3,890.35x = 5,368.71 × 2,122.00
  4. Step 4: Simplify right side
    3,890.35x = 11,392,379.25
  5. Step 5: Solve for x
    x = 11,392,379.25/3,890.35
  6. Step 6: Final answer
    x = 2,928.37

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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.