Home / 4,219.76-5,817.80-2,891.09

Finding the Fourth Proportional to 4,219.76, 5,817.80 and 2,891.09

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Solution

The fourth proportional to 4,219.76, 5,817.80 and 2,891.09 is: 3,985.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,219.76 : 5,817.80 = 2,891.09 : x
  2. Step 2: Convert to fraction form
    4,219.76/5,817.80 = 2,891.09/x
  3. Step 3: Cross multiply
    4,219.76x = 5,817.80 × 2,891.09
  4. Step 4: Simplify right side
    4,219.76x = 16,819,739.86
  5. Step 5: Solve for x
    x = 16,819,739.86/4,219.76
  6. Step 6: Final answer
    x = 3,985.95

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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.