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Finding the Fourth Proportional to 18,950.74, 28,409.90 and 7,272.34

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Solution

The fourth proportional to 18,950.74, 28,409.90 and 7,272.34 is: 10,902.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,950.74 : 28,409.90 = 7,272.34 : x
  2. Step 2: Convert to fraction form
    18,950.74/28,409.90 = 7,272.34/x
  3. Step 3: Cross multiply
    18,950.74x = 28,409.90 × 7,272.34
  4. Step 4: Simplify right side
    18,950.74x = 206,606,452.17
  5. Step 5: Solve for x
    x = 206,606,452.17/18,950.74
  6. Step 6: Final answer
    x = 10,902.29

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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.