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Finding the Fourth Proportional to 18,784.80, 28,165.80 and 12,934.92

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Solution

The fourth proportional to 18,784.80, 28,165.80 and 12,934.92 is: 19,394.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,784.80 : 28,165.80 = 12,934.92 : x
  2. Step 2: Convert to fraction form
    18,784.80/28,165.80 = 12,934.92/x
  3. Step 3: Cross multiply
    18,784.80x = 28,165.80 × 12,934.92
  4. Step 4: Simplify right side
    18,784.80x = 364,322,369.74
  5. Step 5: Solve for x
    x = 364,322,369.74/18,784.80
  6. Step 6: Final answer
    x = 19,394.53

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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.