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Finding the Fourth Proportional to 5,205.60, 7,808.40 and 3,893.40

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Solution

The fourth proportional to 5,205.60, 7,808.40 and 3,893.40 is: 5,840.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,205.60 : 7,808.40 = 3,893.40 : x
  2. Step 2: Convert to fraction form
    5,205.60/7,808.40 = 3,893.40/x
  3. Step 3: Cross multiply
    5,205.60x = 7,808.40 × 3,893.40
  4. Step 4: Simplify right side
    5,205.60x = 30,401,224.56
  5. Step 5: Solve for x
    x = 30,401,224.56/5,205.60
  6. Step 6: Final answer
    x = 5,840.10

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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.