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Finding the Fourth Proportional to 28,045.90, 42,069.93 and 7,268.86

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Solution

The fourth proportional to 28,045.90, 42,069.93 and 7,268.86 is: 10,903.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,045.90 : 42,069.93 = 7,268.86 : x
  2. Step 2: Convert to fraction form
    28,045.90/42,069.93 = 7,268.86/x
  3. Step 3: Cross multiply
    28,045.90x = 42,069.93 × 7,268.86
  4. Step 4: Simplify right side
    28,045.90x = 305,800,431.38
  5. Step 5: Solve for x
    x = 305,800,431.38/28,045.90
  6. Step 6: Final answer
    x = 10,903.57

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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.