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Finding the Fourth Proportional to 18,950.89, 28,403.61 and 8,409.02

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Solution

The fourth proportional to 18,950.89, 28,403.61 and 8,409.02 is: 12,603.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,950.89 : 28,403.61 = 8,409.02 : x
  2. Step 2: Convert to fraction form
    18,950.89/28,403.61 = 8,409.02/x
  3. Step 3: Cross multiply
    18,950.89x = 28,403.61 × 8,409.02
  4. Step 4: Simplify right side
    18,950.89x = 238,846,398.31
  5. Step 5: Solve for x
    x = 238,846,398.31/18,950.89
  6. Step 6: Final answer
    x = 12,603.44

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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.