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Finding the Fourth Proportional to 8,967.80, 12,375.54 and 4,989.16

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Solution

The fourth proportional to 8,967.80, 12,375.54 and 4,989.16 is: 6,885.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,967.80 : 12,375.54 = 4,989.16 : x
  2. Step 2: Convert to fraction form
    8,967.80/12,375.54 = 4,989.16/x
  3. Step 3: Cross multiply
    8,967.80x = 12,375.54 × 4,989.16
  4. Step 4: Simplify right side
    8,967.80x = 61,743,549.15
  5. Step 5: Solve for x
    x = 61,743,549.15/8,967.80
  6. Step 6: Final answer
    x = 6,885.03

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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.