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Finding the Fourth Proportional to 18,698.14, 28,047 and 5,371.46

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Solution

The fourth proportional to 18,698.14, 28,047 and 5,371.46 is: 8,057.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,698.14 : 28,047 = 5,371.46 : x
  2. Step 2: Convert to fraction form
    18,698.14/28,047 = 5,371.46/x
  3. Step 3: Cross multiply
    18,698.14x = 28,047 × 5,371.46
  4. Step 4: Simplify right side
    18,698.14x = 150,653,461.33
  5. Step 5: Solve for x
    x = 150,653,461.33/18,698.14
  6. Step 6: Final answer
    x = 8,057.13

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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.