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Finding the Fourth Proportional to 18,992.48, 28,487.76 and 6,513.68

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Solution

The fourth proportional to 18,992.48, 28,487.76 and 6,513.68 is: 9,770.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,992.48 : 28,487.76 = 6,513.68 : x
  2. Step 2: Convert to fraction form
    18,992.48/28,487.76 = 6,513.68/x
  3. Step 3: Cross multiply
    18,992.48x = 28,487.76 × 6,513.68
  4. Step 4: Simplify right side
    18,992.48x = 185,560,152.56
  5. Step 5: Solve for x
    x = 185,560,152.56/18,992.48
  6. Step 6: Final answer
    x = 9,770.19

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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.