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Finding the Fourth Proportional to 18,699.99, 28,041.76 and 7,005

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Solution

The fourth proportional to 18,699.99, 28,041.76 and 7,005 is: 10,504.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,699.99 : 28,041.76 = 7,005 : x
  2. Step 2: Convert to fraction form
    18,699.99/28,041.76 = 7,005/x
  3. Step 3: Cross multiply
    18,699.99x = 28,041.76 × 7,005
  4. Step 4: Simplify right side
    18,699.99x = 196,432,528.80
  5. Step 5: Solve for x
    x = 196,432,528.80/18,699.99
  6. Step 6: Final answer
    x = 10,504.42

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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.