Home / 3,015.76-4,161.80-1,689.44

Finding the Fourth Proportional to 3,015.76, 4,161.80 and 1,689.44

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Solution

The fourth proportional to 3,015.76, 4,161.80 and 1,689.44 is: 2,331.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,015.76 : 4,161.80 = 1,689.44 : x
  2. Step 2: Convert to fraction form
    3,015.76/4,161.80 = 1,689.44/x
  3. Step 3: Cross multiply
    3,015.76x = 4,161.80 × 1,689.44
  4. Step 4: Simplify right side
    3,015.76x = 7,031,111.39
  5. Step 5: Solve for x
    x = 7,031,111.39/3,015.76
  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.