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Finding the Fourth Proportional to 9,879.36, 14,819.20 and 2,958.72

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Solution

The fourth proportional to 9,879.36, 14,819.20 and 2,958.72 is: 4,438.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,879.36 : 14,819.20 = 2,958.72 : x
  2. Step 2: Convert to fraction form
    9,879.36/14,819.20 = 2,958.72/x
  3. Step 3: Cross multiply
    9,879.36x = 14,819.20 × 2,958.72
  4. Step 4: Simplify right side
    9,879.36x = 43,845,863.42
  5. Step 5: Solve for x
    x = 43,845,863.42/9,879.36
  6. Step 6: Final answer
    x = 4,438.13

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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.