Home / 3,015.47-4,161.61-1,689.16

Finding the Fourth Proportional to 3,015.47, 4,161.61 and 1,689.16

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Solution

The fourth proportional to 3,015.47, 4,161.61 and 1,689.16 is: 2,331.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,015.47 : 4,161.61 = 1,689.16 : x
  2. Step 2: Convert to fraction form
    3,015.47/4,161.61 = 1,689.16/x
  3. Step 3: Cross multiply
    3,015.47x = 4,161.61 × 1,689.16
  4. Step 4: Simplify right side
    3,015.47x = 7,029,625.15
  5. Step 5: Solve for x
    x = 7,029,625.15/3,015.47
  6. Step 6: Final answer
    x = 2,331.19

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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.