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Finding the Fourth Proportional to 19,105.65, 28,658.48 and 12,884.85

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Solution

The fourth proportional to 19,105.65, 28,658.48 and 12,884.85 is: 19,327.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,105.65 : 28,658.48 = 12,884.85 : x
  2. Step 2: Convert to fraction form
    19,105.65/28,658.48 = 12,884.85/x
  3. Step 3: Cross multiply
    19,105.65x = 28,658.48 × 12,884.85
  4. Step 4: Simplify right side
    19,105.65x = 369,260,151.60
  5. Step 5: Solve for x
    x = 369,260,151.60/19,105.65
  6. Step 6: Final answer
    x = 19,327.28

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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.