Home / 2,990.62-4,122.77-2,103.67

Finding the Fourth Proportional to 2,990.62, 4,122.77 and 2,103.67

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Solution

The fourth proportional to 2,990.62, 4,122.77 and 2,103.67 is: 2,900.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.62 : 4,122.77 = 2,103.67 : x
  2. Step 2: Convert to fraction form
    2,990.62/4,122.77 = 2,103.67/x
  3. Step 3: Cross multiply
    2,990.62x = 4,122.77 × 2,103.67
  4. Step 4: Simplify right side
    2,990.62x = 8,672,926.95
  5. Step 5: Solve for x
    x = 8,672,926.95/2,990.62
  6. Step 6: Final answer
    x = 2,900.05

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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.