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Finding the Fourth Proportional to 19,680.96, 27,171 and 18,559.92

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Solution

The fourth proportional to 19,680.96, 27,171 and 18,559.92 is: 25,623.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,680.96 : 27,171 = 18,559.92 : x
  2. Step 2: Convert to fraction form
    19,680.96/27,171 = 18,559.92/x
  3. Step 3: Cross multiply
    19,680.96x = 27,171 × 18,559.92
  4. Step 4: Simplify right side
    19,680.96x = 504,291,586.32
  5. Step 5: Solve for x
    x = 504,291,586.32/19,680.96
  6. Step 6: Final answer
    x = 25,623.32

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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.