Home / 3,890.41-5,368.77-2,122.02

Finding the Fourth Proportional to 3,890.41, 5,368.77 and 2,122.02

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Solution

The fourth proportional to 3,890.41, 5,368.77 and 2,122.02 is: 2,928.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.41 : 5,368.77 = 2,122.02 : x
  2. Step 2: Convert to fraction form
    3,890.41/5,368.77 = 2,122.02/x
  3. Step 3: Cross multiply
    3,890.41x = 5,368.77 × 2,122.02
  4. Step 4: Simplify right side
    3,890.41x = 11,392,637.32
  5. Step 5: Solve for x
    x = 11,392,637.32/3,890.41
  6. Step 6: Final answer
    x = 2,928.39

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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.