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Finding the Fourth Proportional to 18,425.85, 27,636.46 and 8,427.68

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Solution

The fourth proportional to 18,425.85, 27,636.46 and 8,427.68 is: 12,640.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,425.85 : 27,636.46 = 8,427.68 : x
  2. Step 2: Convert to fraction form
    18,425.85/27,636.46 = 8,427.68/x
  3. Step 3: Cross multiply
    18,425.85x = 27,636.46 × 8,427.68
  4. Step 4: Simplify right side
    18,425.85x = 232,911,199.07
  5. Step 5: Solve for x
    x = 232,911,199.07/18,425.85
  6. Step 6: Final answer
    x = 12,640.46

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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.