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Finding the Fourth Proportional to 21,868.80, 32,804.80 and 6,286.56

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Solution

The fourth proportional to 21,868.80, 32,804.80 and 6,286.56 is: 9,430.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,868.80 : 32,804.80 = 6,286.56 : x
  2. Step 2: Convert to fraction form
    21,868.80/32,804.80 = 6,286.56/x
  3. Step 3: Cross multiply
    21,868.80x = 32,804.80 × 6,286.56
  4. Step 4: Simplify right side
    21,868.80x = 206,229,343.49
  5. Step 5: Solve for x
    x = 206,229,343.49/21,868.80
  6. Step 6: Final answer
    x = 9,430.30

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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.