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Finding the Fourth Proportional to 10,808.60, 16,211.70 and 8,857.40

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Solution

The fourth proportional to 10,808.60, 16,211.70 and 8,857.40 is: 13,285.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,808.60 : 16,211.70 = 8,857.40 : x
  2. Step 2: Convert to fraction form
    10,808.60/16,211.70 = 8,857.40/x
  3. Step 3: Cross multiply
    10,808.60x = 16,211.70 × 8,857.40
  4. Step 4: Simplify right side
    10,808.60x = 143,593,511.58
  5. Step 5: Solve for x
    x = 143,593,511.58/10,808.60
  6. Step 6: Final answer
    x = 13,285.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.