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Finding the Fourth Proportional to 13,363.40, 20,006.70 and 8,179.40

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Solution

The fourth proportional to 13,363.40, 20,006.70 and 8,179.40 is: 12,245.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,363.40 : 20,006.70 = 8,179.40 : x
  2. Step 2: Convert to fraction form
    13,363.40/20,006.70 = 8,179.40/x
  3. Step 3: Cross multiply
    13,363.40x = 20,006.70 × 8,179.40
  4. Step 4: Simplify right side
    13,363.40x = 163,642,801.98
  5. Step 5: Solve for x
    x = 163,642,801.98/13,363.40
  6. Step 6: Final answer
    x = 12,245.60

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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.