Home / 3,015.29-4,161.31-1,689.12

Finding the Fourth Proportional to 3,015.29, 4,161.31 and 1,689.12

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Solution

The fourth proportional to 3,015.29, 4,161.31 and 1,689.12 is: 2,331.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,015.29 : 4,161.31 = 1,689.12 : x
  2. Step 2: Convert to fraction form
    3,015.29/4,161.31 = 1,689.12/x
  3. Step 3: Cross multiply
    3,015.29x = 4,161.31 × 1,689.12
  4. Step 4: Simplify right side
    3,015.29x = 7,028,947.72
  5. Step 5: Solve for x
    x = 7,028,947.72/3,015.29
  6. Step 6: Final answer
    x = 2,331.10

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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.