Home / 3,928.42-5,421.10-2,159.86

Finding the Fourth Proportional to 3,928.42, 5,421.10 and 2,159.86

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Solution

The fourth proportional to 3,928.42, 5,421.10 and 2,159.86 is: 2,980.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.42 : 5,421.10 = 2,159.86 : x
  2. Step 2: Convert to fraction form
    3,928.42/5,421.10 = 2,159.86/x
  3. Step 3: Cross multiply
    3,928.42x = 5,421.10 × 2,159.86
  4. Step 4: Simplify right side
    3,928.42x = 11,708,817.05
  5. Step 5: Solve for x
    x = 11,708,817.05/3,928.42
  6. Step 6: Final answer
    x = 2,980.54

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.