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Finding the Fourth Proportional to 6,289.80, 9,431.10 and 5,579.16

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Solution

The fourth proportional to 6,289.80, 9,431.10 and 5,579.16 is: 8,365.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,289.80 : 9,431.10 = 5,579.16 : x
  2. Step 2: Convert to fraction form
    6,289.80/9,431.10 = 5,579.16/x
  3. Step 3: Cross multiply
    6,289.80x = 9,431.10 × 5,579.16
  4. Step 4: Simplify right side
    6,289.80x = 52,617,615.88
  5. Step 5: Solve for x
    x = 52,617,615.88/6,289.80
  6. Step 6: Final answer
    x = 8,365.55

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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.