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Finding the Fourth Proportional to 18,506.88, 27,734.40 and 9,728.64

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Solution

The fourth proportional to 18,506.88, 27,734.40 and 9,728.64 is: 14,579.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,506.88 : 27,734.40 = 9,728.64 : x
  2. Step 2: Convert to fraction form
    18,506.88/27,734.40 = 9,728.64/x
  3. Step 3: Cross multiply
    18,506.88x = 27,734.40 × 9,728.64
  4. Step 4: Simplify right side
    18,506.88x = 269,817,993.22
  5. Step 5: Solve for x
    x = 269,817,993.22/18,506.88
  6. Step 6: Final answer
    x = 14,579.33

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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.