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Finding the Fourth Proportional to 7,913.20, 11,853.60 and 4,019.80

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Solution

The fourth proportional to 7,913.20, 11,853.60 and 4,019.80 is: 6,021.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,913.20 : 11,853.60 = 4,019.80 : x
  2. Step 2: Convert to fraction form
    7,913.20/11,853.60 = 4,019.80/x
  3. Step 3: Cross multiply
    7,913.20x = 11,853.60 × 4,019.80
  4. Step 4: Simplify right side
    7,913.20x = 47,649,101.28
  5. Step 5: Solve for x
    x = 47,649,101.28/7,913.20
  6. Step 6: Final answer
    x = 6,021.47

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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.