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Finding the Fourth Proportional to 18,698.42, 28,040.34 and 7,005.26

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Solution

The fourth proportional to 18,698.42, 28,040.34 and 7,005.26 is: 10,505.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,698.42 : 28,040.34 = 7,005.26 : x
  2. Step 2: Convert to fraction form
    18,698.42/28,040.34 = 7,005.26/x
  3. Step 3: Cross multiply
    18,698.42x = 28,040.34 × 7,005.26
  4. Step 4: Simplify right side
    18,698.42x = 196,429,872.19
  5. Step 5: Solve for x
    x = 196,429,872.19/18,698.42
  6. Step 6: Final answer
    x = 10,505.16

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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.