Home / 13,840.91-20,762.43-3,980.96

Finding the Fourth Proportional to 13,840.91, 20,762.43 and 3,980.96

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Solution

The fourth proportional to 13,840.91, 20,762.43 and 3,980.96 is: 5,971.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,840.91 : 20,762.43 = 3,980.96 : x
  2. Step 2: Convert to fraction form
    13,840.91/20,762.43 = 3,980.96/x
  3. Step 3: Cross multiply
    13,840.91x = 20,762.43 × 3,980.96
  4. Step 4: Simplify right side
    13,840.91x = 82,654,403.33
  5. Step 5: Solve for x
    x = 82,654,403.33/13,840.91
  6. Step 6: Final answer
    x = 5,971.75

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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.