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Finding the Fourth Proportional to 18,638.39, 27,948.74 and 6,783.77

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Solution

The fourth proportional to 18,638.39, 27,948.74 and 6,783.77 is: 10,172.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,638.39 : 27,948.74 = 6,783.77 : x
  2. Step 2: Convert to fraction form
    18,638.39/27,948.74 = 6,783.77/x
  3. Step 3: Cross multiply
    18,638.39x = 27,948.74 × 6,783.77
  4. Step 4: Simplify right side
    18,638.39x = 189,597,650.29
  5. Step 5: Solve for x
    x = 189,597,650.29/18,638.39
  6. Step 6: Final answer
    x = 10,172.43

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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.