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Finding the Fourth Proportional to 18,678.97, 28,034.90 and 9,800.65

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Solution

The fourth proportional to 18,678.97, 28,034.90 and 9,800.65 is: 14,709.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,678.97 : 28,034.90 = 9,800.65 : x
  2. Step 2: Convert to fraction form
    18,678.97/28,034.90 = 9,800.65/x
  3. Step 3: Cross multiply
    18,678.97x = 28,034.90 × 9,800.65
  4. Step 4: Simplify right side
    18,678.97x = 274,760,265.48
  5. Step 5: Solve for x
    x = 274,760,265.48/18,678.97
  6. Step 6: Final answer
    x = 14,709.60

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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.