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Finding the Fourth Proportional to 8,885.34, 12,172.86 and 8,553.06

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Solution

The fourth proportional to 8,885.34, 12,172.86 and 8,553.06 is: 11,717.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,885.34 : 12,172.86 = 8,553.06 : x
  2. Step 2: Convert to fraction form
    8,885.34/12,172.86 = 8,553.06/x
  3. Step 3: Cross multiply
    8,885.34x = 12,172.86 × 8,553.06
  4. Step 4: Simplify right side
    8,885.34x = 104,115,201.95
  5. Step 5: Solve for x
    x = 104,115,201.95/8,885.34
  6. Step 6: Final answer
    x = 11,717.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.