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Finding the Fourth Proportional to 8,966.70, 12,375.18 and 4,989.60

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Solution

The fourth proportional to 8,966.70, 12,375.18 and 4,989.60 is: 6,886.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,966.70 : 12,375.18 = 4,989.60 : x
  2. Step 2: Convert to fraction form
    8,966.70/12,375.18 = 4,989.60/x
  3. Step 3: Cross multiply
    8,966.70x = 12,375.18 × 4,989.60
  4. Step 4: Simplify right side
    8,966.70x = 61,747,198.13
  5. Step 5: Solve for x
    x = 61,747,198.13/8,966.70
  6. Step 6: Final answer
    x = 6,886.28

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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.