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Finding the Fourth Proportional to 9,394.88, 12,961.99 and 5,415.46

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Solution

The fourth proportional to 9,394.88, 12,961.99 and 5,415.46 is: 7,471.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,394.88 : 12,961.99 = 5,415.46 : x
  2. Step 2: Convert to fraction form
    9,394.88/12,961.99 = 5,415.46/x
  3. Step 3: Cross multiply
    9,394.88x = 12,961.99 × 5,415.46
  4. Step 4: Simplify right side
    9,394.88x = 70,195,138.37
  5. Step 5: Solve for x
    x = 70,195,138.37/9,394.88
  6. Step 6: Final answer
    x = 7,471.64

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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.