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Finding the Fourth Proportional to 18,907.31, 28,359.99 and 7,060.14

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Solution

The fourth proportional to 18,907.31, 28,359.99 and 7,060.14 is: 10,589.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907.31 : 28,359.99 = 7,060.14 : x
  2. Step 2: Convert to fraction form
    18,907.31/28,359.99 = 7,060.14/x
  3. Step 3: Cross multiply
    18,907.31x = 28,359.99 × 7,060.14
  4. Step 4: Simplify right side
    18,907.31x = 200,225,499.80
  5. Step 5: Solve for x
    x = 200,225,499.80/18,907.31
  6. Step 6: Final answer
    x = 10,589.85

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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.