Home / 4,072.90-6,105.12-1,990.06

Finding the Fourth Proportional to 4,072.90, 6,105.12 and 1,990.06

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Solution

The fourth proportional to 4,072.90, 6,105.12 and 1,990.06 is: 2,983.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,072.90 : 6,105.12 = 1,990.06 : x
  2. Step 2: Convert to fraction form
    4,072.90/6,105.12 = 1,990.06/x
  3. Step 3: Cross multiply
    4,072.90x = 6,105.12 × 1,990.06
  4. Step 4: Simplify right side
    4,072.90x = 12,149,555.11
  5. Step 5: Solve for x
    x = 12,149,555.11/4,072.90
  6. Step 6: Final answer
    x = 2,983.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.