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Finding the Fourth Proportional to 6,423.96, 8,865.12 and 3,771.40

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Solution

The fourth proportional to 6,423.96, 8,865.12 and 3,771.40 is: 5,204.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,423.96 : 8,865.12 = 3,771.40 : x
  2. Step 2: Convert to fraction form
    6,423.96/8,865.12 = 3,771.40/x
  3. Step 3: Cross multiply
    6,423.96x = 8,865.12 × 3,771.40
  4. Step 4: Simplify right side
    6,423.96x = 33,433,913.57
  5. Step 5: Solve for x
    x = 33,433,913.57/6,423.96
  6. Step 6: Final answer
    x = 5,204.56

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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.