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Finding the Fourth Proportional to 19,696.43, 29,520.03 and 12,657.70

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Solution

The fourth proportional to 19,696.43, 29,520.03 and 12,657.70 is: 18,970.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,696.43 : 29,520.03 = 12,657.70 : x
  2. Step 2: Convert to fraction form
    19,696.43/29,520.03 = 12,657.70/x
  3. Step 3: Cross multiply
    19,696.43x = 29,520.03 × 12,657.70
  4. Step 4: Simplify right side
    19,696.43x = 373,655,768.10
  5. Step 5: Solve for x
    x = 373,655,768.10/19,696.43
  6. Step 6: Final answer
    x = 18,970.73

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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.