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Finding the Fourth Proportional to 18,678.79, 28,009.05 and 6,194.62

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Solution

The fourth proportional to 18,678.79, 28,009.05 and 6,194.62 is: 9,288.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,678.79 : 28,009.05 = 6,194.62 : x
  2. Step 2: Convert to fraction form
    18,678.79/28,009.05 = 6,194.62/x
  3. Step 3: Cross multiply
    18,678.79x = 28,009.05 × 6,194.62
  4. Step 4: Simplify right side
    18,678.79x = 173,505,421.31
  5. Step 5: Solve for x
    x = 173,505,421.31/18,678.79
  6. Step 6: Final answer
    x = 9,288.90

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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.