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Finding the Fourth Proportional to 6,403.35, 8,835.11 and 3,885.40

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Solution

The fourth proportional to 6,403.35, 8,835.11 and 3,885.40 is: 5,360.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,403.35 : 8,835.11 = 3,885.40 : x
  2. Step 2: Convert to fraction form
    6,403.35/8,835.11 = 3,885.40/x
  3. Step 3: Cross multiply
    6,403.35x = 8,835.11 × 3,885.40
  4. Step 4: Simplify right side
    6,403.35x = 34,327,921.70
  5. Step 5: Solve for x
    x = 34,327,921.70/6,403.35
  6. Step 6: Final answer
    x = 5,360.94

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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.