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Finding the Fourth Proportional to 5,639.70, 7,784.46 and 3,650.21

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Solution

The fourth proportional to 5,639.70, 7,784.46 and 3,650.21 is: 5,038.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,639.70 : 7,784.46 = 3,650.21 : x
  2. Step 2: Convert to fraction form
    5,639.70/7,784.46 = 3,650.21/x
  3. Step 3: Cross multiply
    5,639.70x = 7,784.46 × 3,650.21
  4. Step 4: Simplify right side
    5,639.70x = 28,414,874.81
  5. Step 5: Solve for x
    x = 28,414,874.81/5,639.70
  6. Step 6: Final answer
    x = 5,038.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.