Home / 3,409.14-5,138.80-3,128.28

Finding the Fourth Proportional to 3,409.14, 5,138.80 and 3,128.28

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Solution

The fourth proportional to 3,409.14, 5,138.80 and 3,128.28 is: 4,715.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,409.14 : 5,138.80 = 3,128.28 : x
  2. Step 2: Convert to fraction form
    3,409.14/5,138.80 = 3,128.28/x
  3. Step 3: Cross multiply
    3,409.14x = 5,138.80 × 3,128.28
  4. Step 4: Simplify right side
    3,409.14x = 16,075,605.26
  5. Step 5: Solve for x
    x = 16,075,605.26/3,409.14
  6. Step 6: Final answer
    x = 4,715.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.