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Finding the Fourth Proportional to 19,975.82, 30,005.03 and 19,311.82

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Solution

The fourth proportional to 19,975.82, 30,005.03 and 19,311.82 is: 29,007.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,975.82 : 30,005.03 = 19,311.82 : x
  2. Step 2: Convert to fraction form
    19,975.82/30,005.03 = 19,311.82/x
  3. Step 3: Cross multiply
    19,975.82x = 30,005.03 × 19,311.82
  4. Step 4: Simplify right side
    19,975.82x = 579,451,711.72
  5. Step 5: Solve for x
    x = 579,451,711.72/19,975.82
  6. Step 6: Final answer
    x = 29,007.66

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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.