Home / 3,015.89-4,161.93-1,689.61

Finding the Fourth Proportional to 3,015.89, 4,161.93 and 1,689.61

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Solution

The fourth proportional to 3,015.89, 4,161.93 and 1,689.61 is: 2,331.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,015.89 : 4,161.93 = 1,689.61 : x
  2. Step 2: Convert to fraction form
    3,015.89/4,161.93 = 1,689.61/x
  3. Step 3: Cross multiply
    3,015.89x = 4,161.93 × 1,689.61
  4. Step 4: Simplify right side
    3,015.89x = 7,032,038.55
  5. Step 5: Solve for x
    x = 7,032,038.55/3,015.89
  6. Step 6: Final answer
    x = 2,331.66

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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.