Home / 5,811.90-8,705.70-3,211.80

Finding the Fourth Proportional to 5,811.90, 8,705.70 and 3,211.80

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Solution

The fourth proportional to 5,811.90, 8,705.70 and 3,211.80 is: 4,810.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,811.90 : 8,705.70 = 3,211.80 : x
  2. Step 2: Convert to fraction form
    5,811.90/8,705.70 = 3,211.80/x
  3. Step 3: Cross multiply
    5,811.90x = 8,705.70 × 3,211.80
  4. Step 4: Simplify right side
    5,811.90x = 27,960,967.26
  5. Step 5: Solve for x
    x = 27,960,967.26/5,811.90
  6. Step 6: Final answer
    x = 4,810.99

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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.