Home / 7,421.36-11,119.88-4,490.78

Finding the Fourth Proportional to 7,421.36, 11,119.88 and 4,490.78

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Solution

The fourth proportional to 7,421.36, 11,119.88 and 4,490.78 is: 6,728.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,421.36 : 11,119.88 = 4,490.78 : x
  2. Step 2: Convert to fraction form
    7,421.36/11,119.88 = 4,490.78/x
  3. Step 3: Cross multiply
    7,421.36x = 11,119.88 × 4,490.78
  4. Step 4: Simplify right side
    7,421.36x = 49,936,890.33
  5. Step 5: Solve for x
    x = 49,936,890.33/7,421.36
  6. Step 6: Final answer
    x = 6,728.81

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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.