Home / 7,420.42-11,128.89-2,154.04

Finding the Fourth Proportional to 7,420.42, 11,128.89 and 2,154.04

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Solution

The fourth proportional to 7,420.42, 11,128.89 and 2,154.04 is: 3,230.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,420.42 : 11,128.89 = 2,154.04 : x
  2. Step 2: Convert to fraction form
    7,420.42/11,128.89 = 2,154.04/x
  3. Step 3: Cross multiply
    7,420.42x = 11,128.89 × 2,154.04
  4. Step 4: Simplify right side
    7,420.42x = 23,972,074.22
  5. Step 5: Solve for x
    x = 23,972,074.22/7,420.42
  6. Step 6: Final answer
    x = 3,230.55

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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.