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Finding the Fourth Proportional to 8,905.40, 13,368.90 and 4,520.60

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Solution

The fourth proportional to 8,905.40, 13,368.90 and 4,520.60 is: 6,786.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,905.40 : 13,368.90 = 4,520.60 : x
  2. Step 2: Convert to fraction form
    8,905.40/13,368.90 = 4,520.60/x
  3. Step 3: Cross multiply
    8,905.40x = 13,368.90 × 4,520.60
  4. Step 4: Simplify right side
    8,905.40x = 60,435,449.34
  5. Step 5: Solve for x
    x = 60,435,449.34/8,905.40
  6. Step 6: Final answer
    x = 6,786.38

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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.