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Finding the Fourth Proportional to 28,689.64, 43,034.49 and 8,968.30

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Solution

The fourth proportional to 28,689.64, 43,034.49 and 8,968.30 is: 13,452.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,689.64 : 43,034.49 = 8,968.30 : x
  2. Step 2: Convert to fraction form
    28,689.64/43,034.49 = 8,968.30/x
  3. Step 3: Cross multiply
    28,689.64x = 43,034.49 × 8,968.30
  4. Step 4: Simplify right side
    28,689.64x = 385,946,109.08
  5. Step 5: Solve for x
    x = 385,946,109.08/28,689.64
  6. Step 6: Final answer
    x = 13,452.46

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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.