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Finding the Fourth Proportional to 18,638.70, 27,944.47 and 8,772.49

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Solution

The fourth proportional to 18,638.70, 27,944.47 and 8,772.49 is: 13,152.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,638.70 : 27,944.47 = 8,772.49 : x
  2. Step 2: Convert to fraction form
    18,638.70/27,944.47 = 8,772.49/x
  3. Step 3: Cross multiply
    18,638.70x = 27,944.47 × 8,772.49
  4. Step 4: Simplify right side
    18,638.70x = 245,142,583.63
  5. Step 5: Solve for x
    x = 245,142,583.63/18,638.70
  6. Step 6: Final answer
    x = 13,152.34

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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.