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Finding the Fourth Proportional to 9,961.35, 13,685.15 and 8,913

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Solution

The fourth proportional to 9,961.35, 13,685.15 and 8,913 is: 12,244.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,961.35 : 13,685.15 = 8,913 : x
  2. Step 2: Convert to fraction form
    9,961.35/13,685.15 = 8,913/x
  3. Step 3: Cross multiply
    9,961.35x = 13,685.15 × 8,913
  4. Step 4: Simplify right side
    9,961.35x = 121,975,697.39
  5. Step 5: Solve for x
    x = 121,975,697.39/9,961.35
  6. Step 6: Final answer
    x = 12,244.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.