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Finding the Fourth Proportional to 18,638.55, 27,948.15 and 5,489.19

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Solution

The fourth proportional to 18,638.55, 27,948.15 and 5,489.19 is: 8,230.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,638.55 : 27,948.15 = 5,489.19 : x
  2. Step 2: Convert to fraction form
    18,638.55/27,948.15 = 5,489.19/x
  3. Step 3: Cross multiply
    18,638.55x = 27,948.15 × 5,489.19
  4. Step 4: Simplify right side
    18,638.55x = 153,412,705.50
  5. Step 5: Solve for x
    x = 153,412,705.50/18,638.55
  6. Step 6: Final answer
    x = 8,230.94

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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.