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Finding the Fourth Proportional to 13,486.70, 20,230.05 and 8,821.10

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Solution

The fourth proportional to 13,486.70, 20,230.05 and 8,821.10 is: 13,231.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,486.70 : 20,230.05 = 8,821.10 : x
  2. Step 2: Convert to fraction form
    13,486.70/20,230.05 = 8,821.10/x
  3. Step 3: Cross multiply
    13,486.70x = 20,230.05 × 8,821.10
  4. Step 4: Simplify right side
    13,486.70x = 178,451,294.06
  5. Step 5: Solve for x
    x = 178,451,294.06/13,486.70
  6. Step 6: Final answer
    x = 13,231.65

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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.