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Finding the Fourth Proportional to 11,905.79, 17,886.02 and 8,403.84

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Solution

The fourth proportional to 11,905.79, 17,886.02 and 8,403.84 is: 12,625.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,905.79 : 17,886.02 = 8,403.84 : x
  2. Step 2: Convert to fraction form
    11,905.79/17,886.02 = 8,403.84/x
  3. Step 3: Cross multiply
    11,905.79x = 17,886.02 × 8,403.84
  4. Step 4: Simplify right side
    11,905.79x = 150,311,208.30
  5. Step 5: Solve for x
    x = 150,311,208.30/11,905.79
  6. Step 6: Final answer
    x = 12,625.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.