Home / 3,678.28-5,075.91-1,999.63

Finding the Fourth Proportional to 3,678.28, 5,075.91 and 1,999.63

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Solution

The fourth proportional to 3,678.28, 5,075.91 and 1,999.63 is: 2,759.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,678.28 : 5,075.91 = 1,999.63 : x
  2. Step 2: Convert to fraction form
    3,678.28/5,075.91 = 1,999.63/x
  3. Step 3: Cross multiply
    3,678.28x = 5,075.91 × 1,999.63
  4. Step 4: Simplify right side
    3,678.28x = 10,149,941.91
  5. Step 5: Solve for x
    x = 10,149,941.91/3,678.28
  6. Step 6: Final answer
    x = 2,759.43

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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.