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Finding the Fourth Proportional to 18,673.40, 28,004.70 and 6,825.80

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Solution

The fourth proportional to 18,673.40, 28,004.70 and 6,825.80 is: 10,236.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,673.40 : 28,004.70 = 6,825.80 : x
  2. Step 2: Convert to fraction form
    18,673.40/28,004.70 = 6,825.80/x
  3. Step 3: Cross multiply
    18,673.40x = 28,004.70 × 6,825.80
  4. Step 4: Simplify right side
    18,673.40x = 191,154,481.26
  5. Step 5: Solve for x
    x = 191,154,481.26/18,673.40
  6. Step 6: Final answer
    x = 10,236.73

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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.