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Finding the Fourth Proportional to 18,643.44, 27,964.38 and 12,705.49

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Solution

The fourth proportional to 18,643.44, 27,964.38 and 12,705.49 is: 19,057.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,643.44 : 27,964.38 = 12,705.49 : x
  2. Step 2: Convert to fraction form
    18,643.44/27,964.38 = 12,705.49/x
  3. Step 3: Cross multiply
    18,643.44x = 27,964.38 × 12,705.49
  4. Step 4: Simplify right side
    18,643.44x = 355,301,197.31
  5. Step 5: Solve for x
    x = 355,301,197.31/18,643.44
  6. Step 6: Final answer
    x = 19,057.70

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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.