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Finding the Fourth Proportional to 6,120.84, 8,439 and 5,000.64

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Solution

The fourth proportional to 6,120.84, 8,439 and 5,000.64 is: 6,894.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,120.84 : 8,439 = 5,000.64 : x
  2. Step 2: Convert to fraction form
    6,120.84/8,439 = 5,000.64/x
  3. Step 3: Cross multiply
    6,120.84x = 8,439 × 5,000.64
  4. Step 4: Simplify right side
    6,120.84x = 42,200,400.96
  5. Step 5: Solve for x
    x = 42,200,400.96/6,120.84
  6. Step 6: Final answer
    x = 6,894.54

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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.