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Finding the Fourth Proportional to 6,673.76, 9,209.79 and 4,021.21

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Solution

The fourth proportional to 6,673.76, 9,209.79 and 4,021.21 is: 5,549.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,673.76 : 9,209.79 = 4,021.21 : x
  2. Step 2: Convert to fraction form
    6,673.76/9,209.79 = 4,021.21/x
  3. Step 3: Cross multiply
    6,673.76x = 9,209.79 × 4,021.21
  4. Step 4: Simplify right side
    6,673.76x = 37,034,499.65
  5. Step 5: Solve for x
    x = 37,034,499.65/6,673.76
  6. Step 6: Final answer
    x = 5,549.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.