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Finding the Fourth Proportional to 18,950.56, 28,425.92 and 12,379.84

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Solution

The fourth proportional to 18,950.56, 28,425.92 and 12,379.84 is: 18,569.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,950.56 : 28,425.92 = 12,379.84 : x
  2. Step 2: Convert to fraction form
    18,950.56/28,425.92 = 12,379.84/x
  3. Step 3: Cross multiply
    18,950.56x = 28,425.92 × 12,379.84
  4. Step 4: Simplify right side
    18,950.56x = 351,908,341.45
  5. Step 5: Solve for x
    x = 351,908,341.45/18,950.56
  6. Step 6: Final answer
    x = 18,569.81

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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.