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Finding the Fourth Proportional to 18,907.18, 28,359.90 and 7,060.03

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Solution

The fourth proportional to 18,907.18, 28,359.90 and 7,060.03 is: 10,589.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907.18 : 28,359.90 = 7,060.03 : x
  2. Step 2: Convert to fraction form
    18,907.18/28,359.90 = 7,060.03/x
  3. Step 3: Cross multiply
    18,907.18x = 28,359.90 × 7,060.03
  4. Step 4: Simplify right side
    18,907.18x = 200,221,603.00
  5. Step 5: Solve for x
    x = 200,221,603.00/18,907.18
  6. Step 6: Final answer
    x = 10,589.72

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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.