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Finding the Fourth Proportional to 17,912.40, 26,868.60 and 6,815.40

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Solution

The fourth proportional to 17,912.40, 26,868.60 and 6,815.40 is: 10,223.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,912.40 : 26,868.60 = 6,815.40 : x
  2. Step 2: Convert to fraction form
    17,912.40/26,868.60 = 6,815.40/x
  3. Step 3: Cross multiply
    17,912.40x = 26,868.60 × 6,815.40
  4. Step 4: Simplify right side
    17,912.40x = 183,120,256.44
  5. Step 5: Solve for x
    x = 183,120,256.44/17,912.40
  6. Step 6: Final answer
    x = 10,223.10

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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.