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Finding the Fourth Proportional to 18,310.72, 27,427.72 and 11,703.28

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Solution

The fourth proportional to 18,310.72, 27,427.72 and 11,703.28 is: 17,530.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,310.72 : 27,427.72 = 11,703.28 : x
  2. Step 2: Convert to fraction form
    18,310.72/27,427.72 = 11,703.28/x
  3. Step 3: Cross multiply
    18,310.72x = 27,427.72 × 11,703.28
  4. Step 4: Simplify right side
    18,310.72x = 320,994,286.92
  5. Step 5: Solve for x
    x = 320,994,286.92/18,310.72
  6. Step 6: Final answer
    x = 17,530.40

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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.