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Finding the Fourth Proportional to 19,940.68, 29,894.88 and 7,458.92

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Solution

The fourth proportional to 19,940.68, 29,894.88 and 7,458.92 is: 11,182.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,940.68 : 29,894.88 = 7,458.92 : x
  2. Step 2: Convert to fraction form
    19,940.68/29,894.88 = 7,458.92/x
  3. Step 3: Cross multiply
    19,940.68x = 29,894.88 × 7,458.92
  4. Step 4: Simplify right side
    19,940.68x = 222,983,518.33
  5. Step 5: Solve for x
    x = 222,983,518.33/19,940.68
  6. Step 6: Final answer
    x = 11,182.34

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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.