Home / 5,640.46-8,461.50-2,131.78

Finding the Fourth Proportional to 5,640.46, 8,461.50 and 2,131.78

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Solution

The fourth proportional to 5,640.46, 8,461.50 and 2,131.78 is: 3,197.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,640.46 : 8,461.50 = 2,131.78 : x
  2. Step 2: Convert to fraction form
    5,640.46/8,461.50 = 2,131.78/x
  3. Step 3: Cross multiply
    5,640.46x = 8,461.50 × 2,131.78
  4. Step 4: Simplify right side
    5,640.46x = 18,038,056.47
  5. Step 5: Solve for x
    x = 18,038,056.47/5,640.46
  6. Step 6: Final answer
    x = 3,197.98

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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.