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Finding the Fourth Proportional to 19,364.70, 29,079.45 and 12,819.90

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Solution

The fourth proportional to 19,364.70, 29,079.45 and 12,819.90 is: 19,251.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,364.70 : 29,079.45 = 12,819.90 : x
  2. Step 2: Convert to fraction form
    19,364.70/29,079.45 = 12,819.90/x
  3. Step 3: Cross multiply
    19,364.70x = 29,079.45 × 12,819.90
  4. Step 4: Simplify right side
    19,364.70x = 372,795,641.06
  5. Step 5: Solve for x
    x = 372,795,641.06/19,364.70
  6. Step 6: Final answer
    x = 19,251.30

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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.