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Finding the Fourth Proportional to 12,171.70, 18,217.05 and 8,830.45

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Solution

The fourth proportional to 12,171.70, 18,217.05 and 8,830.45 is: 13,216.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,171.70 : 18,217.05 = 8,830.45 : x
  2. Step 2: Convert to fraction form
    12,171.70/18,217.05 = 8,830.45/x
  3. Step 3: Cross multiply
    12,171.70x = 18,217.05 × 8,830.45
  4. Step 4: Simplify right side
    12,171.70x = 160,864,749.17
  5. Step 5: Solve for x
    x = 160,864,749.17/12,171.70
  6. Step 6: Final answer
    x = 13,216.29

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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.