Home / 3,017.80-4,160.20-2,118.80

Finding the Fourth Proportional to 3,017.80, 4,160.20 and 2,118.80

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Solution

The fourth proportional to 3,017.80, 4,160.20 and 2,118.80 is: 2,920.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,017.80 : 4,160.20 = 2,118.80 : x
  2. Step 2: Convert to fraction form
    3,017.80/4,160.20 = 2,118.80/x
  3. Step 3: Cross multiply
    3,017.80x = 4,160.20 × 2,118.80
  4. Step 4: Simplify right side
    3,017.80x = 8,814,621.17
  5. Step 5: Solve for x
    x = 8,814,621.17/3,017.80
  6. Step 6: Final answer
    x = 2,920.88

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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.