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Finding the Fourth Proportional to 28,729.20, 42,996.60 and 28,729.20

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Solution

The fourth proportional to 28,729.20, 42,996.60 and 28,729.20 is: 42,996.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,729.20 : 42,996.60 = 28,729.20 : x
  2. Step 2: Convert to fraction form
    28,729.20/42,996.60 = 28,729.20/x
  3. Step 3: Cross multiply
    28,729.20x = 42,996.60 × 28,729.20
  4. Step 4: Simplify right side
    28,729.20x = 1,235,257,920.72
  5. Step 5: Solve for x
    x = 1,235,257,920.72/28,729.20
  6. Step 6: Final answer
    x = 42,996.60

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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.