Home / 3,015.85-4,161.89-1,689.46

Finding the Fourth Proportional to 3,015.85, 4,161.89 and 1,689.46

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Solution

The fourth proportional to 3,015.85, 4,161.89 and 1,689.46 is: 2,331.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,015.85 : 4,161.89 = 1,689.46 : x
  2. Step 2: Convert to fraction form
    3,015.85/4,161.89 = 1,689.46/x
  3. Step 3: Cross multiply
    3,015.85x = 4,161.89 × 1,689.46
  4. Step 4: Simplify right side
    3,015.85x = 7,031,346.68
  5. Step 5: Solve for x
    x = 7,031,346.68/3,015.85
  6. Step 6: Final answer
    x = 2,331.46

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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.