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Finding the Fourth Proportional to 5,619.90, 8,430.09 and 2,847.90

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Solution

The fourth proportional to 5,619.90, 8,430.09 and 2,847.90 is: 4,271.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,619.90 : 8,430.09 = 2,847.90 : x
  2. Step 2: Convert to fraction form
    5,619.90/8,430.09 = 2,847.90/x
  3. Step 3: Cross multiply
    5,619.90x = 8,430.09 × 2,847.90
  4. Step 4: Simplify right side
    5,619.90x = 24,008,053.31
  5. Step 5: Solve for x
    x = 24,008,053.31/5,619.90
  6. Step 6: Final answer
    x = 4,271.97

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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.