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Finding the Fourth Proportional to 30,103.80, 45,198.90 and 16,981.80

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Solution

The fourth proportional to 30,103.80, 45,198.90 and 16,981.80 is: 25,497.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,103.80 : 45,198.90 = 16,981.80 : x
  2. Step 2: Convert to fraction form
    30,103.80/45,198.90 = 16,981.80/x
  3. Step 3: Cross multiply
    30,103.80x = 45,198.90 × 16,981.80
  4. Step 4: Simplify right side
    30,103.80x = 767,558,680.02
  5. Step 5: Solve for x
    x = 767,558,680.02/30,103.80
  6. Step 6: Final answer
    x = 25,497.07

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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.