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Finding the Fourth Proportional to 18,670.48, 28,004.79 and 6,982.79

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Solution

The fourth proportional to 18,670.48, 28,004.79 and 6,982.79 is: 10,473.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,670.48 : 28,004.79 = 6,982.79 : x
  2. Step 2: Convert to fraction form
    18,670.48/28,004.79 = 6,982.79/x
  3. Step 3: Cross multiply
    18,670.48x = 28,004.79 × 6,982.79
  4. Step 4: Simplify right side
    18,670.48x = 195,551,427.54
  5. Step 5: Solve for x
    x = 195,551,427.54/18,670.48
  6. Step 6: Final answer
    x = 10,473.83

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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.