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Finding the Fourth Proportional to 8,522.18, 12,783.28 and 3,905.18

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Solution

The fourth proportional to 8,522.18, 12,783.28 and 3,905.18 is: 5,857.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,522.18 : 12,783.28 = 3,905.18 : x
  2. Step 2: Convert to fraction form
    8,522.18/12,783.28 = 3,905.18/x
  3. Step 3: Cross multiply
    8,522.18x = 12,783.28 × 3,905.18
  4. Step 4: Simplify right side
    8,522.18x = 49,921,009.39
  5. Step 5: Solve for x
    x = 49,921,009.39/8,522.18
  6. Step 6: Final answer
    x = 5,857.77

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Similar ratio
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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.