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Finding the Fourth Proportional to 18,674.85, 28,015.01 and 6,829.21

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Solution

The fourth proportional to 18,674.85, 28,015.01 and 6,829.21 is: 10,244.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,674.85 : 28,015.01 = 6,829.21 : x
  2. Step 2: Convert to fraction form
    18,674.85/28,015.01 = 6,829.21/x
  3. Step 3: Cross multiply
    18,674.85x = 28,015.01 × 6,829.21
  4. Step 4: Simplify right side
    18,674.85x = 191,320,386.44
  5. Step 5: Solve for x
    x = 191,320,386.44/18,674.85
  6. Step 6: Final answer
    x = 10,244.82

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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.