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Finding the Fourth Proportional to 5,418.70, 8,112.21 and 4,899.90

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Solution

The fourth proportional to 5,418.70, 8,112.21 and 4,899.90 is: 7,335.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,418.70 : 8,112.21 = 4,899.90 : x
  2. Step 2: Convert to fraction form
    5,418.70/8,112.21 = 4,899.90/x
  3. Step 3: Cross multiply
    5,418.70x = 8,112.21 × 4,899.90
  4. Step 4: Simplify right side
    5,418.70x = 39,749,017.78
  5. Step 5: Solve for x
    x = 39,749,017.78/5,418.70
  6. Step 6: Final answer
    x = 7,335.53

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1.5x scale

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.