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Finding the Fourth Proportional to 55,756, 83,634 and 18,820

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Solution

The fourth proportional to 55,756, 83,634 and 18,820 is: 28,230

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,756 : 83,634 = 18,820 : x
  2. Step 2: Convert to fraction form
    55,756/83,634 = 18,820/x
  3. Step 3: Cross multiply
    55,756x = 83,634 × 18,820
  4. Step 4: Simplify right side
    55,756x = 1,573,991,880
  5. Step 5: Solve for x
    x = 1,573,991,880/55,756
  6. Step 6: Final answer
    x = 28,230

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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.