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Finding the Fourth Proportional to 8,968.34, 12,375.69 and 4,989.30

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Solution

The fourth proportional to 8,968.34, 12,375.69 and 4,989.30 is: 6,884.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,968.34 : 12,375.69 = 4,989.30 : x
  2. Step 2: Convert to fraction form
    8,968.34/12,375.69 = 4,989.30/x
  3. Step 3: Cross multiply
    8,968.34x = 12,375.69 × 4,989.30
  4. Step 4: Simplify right side
    8,968.34x = 61,746,030.12
  5. Step 5: Solve for x
    x = 61,746,030.12/8,968.34
  6. Step 6: Final answer
    x = 6,884.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.