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Finding the Fourth Proportional to 8,968.50, 12,375.36 and 4,989.78

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Solution

The fourth proportional to 8,968.50, 12,375.36 and 4,989.78 is: 6,885.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,968.50 : 12,375.36 = 4,989.78 : x
  2. Step 2: Convert to fraction form
    8,968.50/12,375.36 = 4,989.78/x
  3. Step 3: Cross multiply
    8,968.50x = 12,375.36 × 4,989.78
  4. Step 4: Simplify right side
    8,968.50x = 61,750,323.82
  5. Step 5: Solve for x
    x = 61,750,323.82/8,968.50
  6. Step 6: Final answer
    x = 6,885.25

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1.5x scale

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.