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Finding the Fourth Proportional to 8,913.30, 13,383.78 and 8,518.83

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Solution

The fourth proportional to 8,913.30, 13,383.78 and 8,518.83 is: 12,791.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,913.30 : 13,383.78 = 8,518.83 : x
  2. Step 2: Convert to fraction form
    8,913.30/13,383.78 = 8,518.83/x
  3. Step 3: Cross multiply
    8,913.30x = 13,383.78 × 8,518.83
  4. Step 4: Simplify right side
    8,913.30x = 114,014,146.58
  5. Step 5: Solve for x
    x = 114,014,146.58/8,913.30
  6. Step 6: Final answer
    x = 12,791.46

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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.