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Finding the Fourth Proportional to 18,858.38, 28,290.63 and 6,379.16

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Solution

The fourth proportional to 18,858.38, 28,290.63 and 6,379.16 is: 9,569.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,858.38 : 28,290.63 = 6,379.16 : x
  2. Step 2: Convert to fraction form
    18,858.38/28,290.63 = 6,379.16/x
  3. Step 3: Cross multiply
    18,858.38x = 28,290.63 × 6,379.16
  4. Step 4: Simplify right side
    18,858.38x = 180,470,526.00
  5. Step 5: Solve for x
    x = 180,470,526.00/18,858.38
  6. Step 6: Final answer
    x = 9,569.78

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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.