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Finding the Fourth Proportional to 18,922.30, 28,386.90 and 6,441.73

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Solution

The fourth proportional to 18,922.30, 28,386.90 and 6,441.73 is: 9,663.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,922.30 : 28,386.90 = 6,441.73 : x
  2. Step 2: Convert to fraction form
    18,922.30/28,386.90 = 6,441.73/x
  3. Step 3: Cross multiply
    18,922.30x = 28,386.90 × 6,441.73
  4. Step 4: Simplify right side
    18,922.30x = 182,860,745.34
  5. Step 5: Solve for x
    x = 182,860,745.34/18,922.30
  6. Step 6: Final answer
    x = 9,663.77

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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.