Home / 3,919.21-5,409.33-3,603.98

Finding the Fourth Proportional to 3,919.21, 5,409.33 and 3,603.98

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Solution

The fourth proportional to 3,919.21, 5,409.33 and 3,603.98 is: 4,974.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919.21 : 5,409.33 = 3,603.98 : x
  2. Step 2: Convert to fraction form
    3,919.21/5,409.33 = 3,603.98/x
  3. Step 3: Cross multiply
    3,919.21x = 5,409.33 × 3,603.98
  4. Step 4: Simplify right side
    3,919.21x = 19,495,117.13
  5. Step 5: Solve for x
    x = 19,495,117.13/3,919.21
  6. Step 6: Final answer
    x = 4,974.25

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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.