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Finding the Fourth Proportional to 11,902.79, 16,427.79 and 9,065.63

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Solution

The fourth proportional to 11,902.79, 16,427.79 and 9,065.63 is: 12,512.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,902.79 : 16,427.79 = 9,065.63 : x
  2. Step 2: Convert to fraction form
    11,902.79/16,427.79 = 9,065.63/x
  3. Step 3: Cross multiply
    11,902.79x = 16,427.79 × 9,065.63
  4. Step 4: Simplify right side
    11,902.79x = 148,928,183.72
  5. Step 5: Solve for x
    x = 148,928,183.72/11,902.79
  6. Step 6: Final answer
    x = 12,512.05

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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.