Home / 13,841.89-20,762.11-3,980.78

Finding the Fourth Proportional to 13,841.89, 20,762.11 and 3,980.78

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Solution

The fourth proportional to 13,841.89, 20,762.11 and 3,980.78 is: 5,970.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,841.89 : 20,762.11 = 3,980.78 : x
  2. Step 2: Convert to fraction form
    13,841.89/20,762.11 = 3,980.78/x
  3. Step 3: Cross multiply
    13,841.89x = 20,762.11 × 3,980.78
  4. Step 4: Simplify right side
    13,841.89x = 82,649,348.88
  5. Step 5: Solve for x
    x = 82,649,348.88/13,841.89
  6. Step 6: Final answer
    x = 5,970.96

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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.