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Finding the Fourth Proportional to 19,566.87, 29,349.95 and 7,879.78

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Solution

The fourth proportional to 19,566.87, 29,349.95 and 7,879.78 is: 11,819.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,566.87 : 29,349.95 = 7,879.78 : x
  2. Step 2: Convert to fraction form
    19,566.87/29,349.95 = 7,879.78/x
  3. Step 3: Cross multiply
    19,566.87x = 29,349.95 × 7,879.78
  4. Step 4: Simplify right side
    19,566.87x = 231,271,146.30
  5. Step 5: Solve for x
    x = 231,271,146.30/19,566.87
  6. Step 6: Final answer
    x = 11,819.53

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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.