Home / 5,409.60-8,109.78-2,121.93

Finding the Fourth Proportional to 5,409.60, 8,109.78 and 2,121.93

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Solution

The fourth proportional to 5,409.60, 8,109.78 and 2,121.93 is: 3,181.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,409.60 : 8,109.78 = 2,121.93 : x
  2. Step 2: Convert to fraction form
    5,409.60/8,109.78 = 2,121.93/x
  3. Step 3: Cross multiply
    5,409.60x = 8,109.78 × 2,121.93
  4. Step 4: Simplify right side
    5,409.60x = 17,208,385.48
  5. Step 5: Solve for x
    x = 17,208,385.48/5,409.60
  6. Step 6: Final answer
    x = 3,181.08

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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.