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Finding the Fourth Proportional to 9,394.89, 12,965.09 and 5,145.86

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Solution

The fourth proportional to 9,394.89, 12,965.09 and 5,145.86 is: 7,101.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,394.89 : 12,965.09 = 5,145.86 : x
  2. Step 2: Convert to fraction form
    9,394.89/12,965.09 = 5,145.86/x
  3. Step 3: Cross multiply
    9,394.89x = 12,965.09 × 5,145.86
  4. Step 4: Simplify right side
    9,394.89x = 66,716,544.71
  5. Step 5: Solve for x
    x = 66,716,544.71/9,394.89
  6. Step 6: Final answer
    x = 7,101.37

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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.