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Finding the Fourth Proportional to 18,959.99, 28,427.84 and 7,874.33

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Solution

The fourth proportional to 18,959.99, 28,427.84 and 7,874.33 is: 11,806.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,959.99 : 28,427.84 = 7,874.33 : x
  2. Step 2: Convert to fraction form
    18,959.99/28,427.84 = 7,874.33/x
  3. Step 3: Cross multiply
    18,959.99x = 28,427.84 × 7,874.33
  4. Step 4: Simplify right side
    18,959.99x = 223,850,244.73
  5. Step 5: Solve for x
    x = 223,850,244.73/18,959.99
  6. Step 6: Final answer
    x = 11,806.45

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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.