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Finding the Fourth Proportional to 18,677.96, 28,021.80 and 6,992.08

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Solution

The fourth proportional to 18,677.96, 28,021.80 and 6,992.08 is: 10,489.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,677.96 : 28,021.80 = 6,992.08 : x
  2. Step 2: Convert to fraction form
    18,677.96/28,021.80 = 6,992.08/x
  3. Step 3: Cross multiply
    18,677.96x = 28,021.80 × 6,992.08
  4. Step 4: Simplify right side
    18,677.96x = 195,930,667.34
  5. Step 5: Solve for x
    x = 195,930,667.34/18,677.96
  6. Step 6: Final answer
    x = 10,489.94

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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.