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Finding the Fourth Proportional to 12,906.10, 19,359.15 and 12,819.70

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Solution

The fourth proportional to 12,906.10, 19,359.15 and 12,819.70 is: 19,229.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,906.10 : 19,359.15 = 12,819.70 : x
  2. Step 2: Convert to fraction form
    12,906.10/19,359.15 = 12,819.70/x
  3. Step 3: Cross multiply
    12,906.10x = 19,359.15 × 12,819.70
  4. Step 4: Simplify right side
    12,906.10x = 248,178,495.26
  5. Step 5: Solve for x
    x = 248,178,495.26/12,906.10
  6. Step 6: Final answer
    x = 19,229.55

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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.