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Finding the Fourth Proportional to 9,911.12, 13,672.14 and 5,931.05

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Solution

The fourth proportional to 9,911.12, 13,672.14 and 5,931.05 is: 8,181.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,911.12 : 13,672.14 = 5,931.05 : x
  2. Step 2: Convert to fraction form
    9,911.12/13,672.14 = 5,931.05/x
  3. Step 3: Cross multiply
    9,911.12x = 13,672.14 × 5,931.05
  4. Step 4: Simplify right side
    9,911.12x = 81,090,145.95
  5. Step 5: Solve for x
    x = 81,090,145.95/9,911.12
  6. Step 6: Final answer
    x = 8,181.73

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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.