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Finding the Fourth Proportional to 7,898.50, 11,847.80 and 3,281.50

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Solution

The fourth proportional to 7,898.50, 11,847.80 and 3,281.50 is: 4,922.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,898.50 : 11,847.80 = 3,281.50 : x
  2. Step 2: Convert to fraction form
    7,898.50/11,847.80 = 3,281.50/x
  3. Step 3: Cross multiply
    7,898.50x = 11,847.80 × 3,281.50
  4. Step 4: Simplify right side
    7,898.50x = 38,878,555.70
  5. Step 5: Solve for x
    x = 38,878,555.70/7,898.50
  6. Step 6: Final answer
    x = 4,922.27

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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.