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Finding the Fourth Proportional to 28,692.47, 43,041.19 and 7,915.97

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Solution

The fourth proportional to 28,692.47, 43,041.19 and 7,915.97 is: 11,874.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,692.47 : 43,041.19 = 7,915.97 : x
  2. Step 2: Convert to fraction form
    28,692.47/43,041.19 = 7,915.97/x
  3. Step 3: Cross multiply
    28,692.47x = 43,041.19 × 7,915.97
  4. Step 4: Simplify right side
    28,692.47x = 340,712,856.62
  5. Step 5: Solve for x
    x = 340,712,856.62/28,692.47
  6. Step 6: Final answer
    x = 11,874.64

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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.