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Finding the Fourth Proportional to 18,698.84, 28,048.03 and 5,372.15

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Solution

The fourth proportional to 18,698.84, 28,048.03 and 5,372.15 is: 8,058.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,698.84 : 28,048.03 = 5,372.15 : x
  2. Step 2: Convert to fraction form
    18,698.84/28,048.03 = 5,372.15/x
  3. Step 3: Cross multiply
    18,698.84x = 28,048.03 × 5,372.15
  4. Step 4: Simplify right side
    18,698.84x = 150,678,224.36
  5. Step 5: Solve for x
    x = 150,678,224.36/18,698.84
  6. Step 6: Final answer
    x = 8,058.16

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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.