Home / 3,015.72-4,161.74-1,689.42

Finding the Fourth Proportional to 3,015.72, 4,161.74 and 1,689.42

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Solution

The fourth proportional to 3,015.72, 4,161.74 and 1,689.42 is: 2,331.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,015.72 : 4,161.74 = 1,689.42 : x
  2. Step 2: Convert to fraction form
    3,015.72/4,161.74 = 1,689.42/x
  3. Step 3: Cross multiply
    3,015.72x = 4,161.74 × 1,689.42
  4. Step 4: Simplify right side
    3,015.72x = 7,030,926.79
  5. Step 5: Solve for x
    x = 7,030,926.79/3,015.72
  6. Step 6: Final answer
    x = 2,331.43

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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.