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Finding the Fourth Proportional to 18,431.79, 27,647.67 and 4,580.79

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Solution

The fourth proportional to 18,431.79, 27,647.67 and 4,580.79 is: 6,871.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,431.79 : 27,647.67 = 4,580.79 : x
  2. Step 2: Convert to fraction form
    18,431.79/27,647.67 = 4,580.79/x
  3. Step 3: Cross multiply
    18,431.79x = 27,647.67 × 4,580.79
  4. Step 4: Simplify right side
    18,431.79x = 126,648,170.26
  5. Step 5: Solve for x
    x = 126,648,170.26/18,431.79
  6. Step 6: Final answer
    x = 6,871.18

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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.