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Finding the Fourth Proportional to 7,870.44, 11,800.26 and 2,939.16

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Solution

The fourth proportional to 7,870.44, 11,800.26 and 2,939.16 is: 4,406.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,870.44 : 11,800.26 = 2,939.16 : x
  2. Step 2: Convert to fraction form
    7,870.44/11,800.26 = 2,939.16/x
  3. Step 3: Cross multiply
    7,870.44x = 11,800.26 × 2,939.16
  4. Step 4: Simplify right side
    7,870.44x = 34,682,852.18
  5. Step 5: Solve for x
    x = 34,682,852.18/7,870.44
  6. Step 6: Final answer
    x = 4,406.72

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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.