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Finding the Fourth Proportional to 18,698.17, 28,039.96 and 7,005.01

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Solution

The fourth proportional to 18,698.17, 28,039.96 and 7,005.01 is: 10,504.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,698.17 : 28,039.96 = 7,005.01 : x
  2. Step 2: Convert to fraction form
    18,698.17/28,039.96 = 7,005.01/x
  3. Step 3: Cross multiply
    18,698.17x = 28,039.96 × 7,005.01
  4. Step 4: Simplify right side
    18,698.17x = 196,420,200.20
  5. Step 5: Solve for x
    x = 196,420,200.20/18,698.17
  6. Step 6: Final answer
    x = 10,504.78

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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.