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Finding the Fourth Proportional to 30,169.69, 45,250.62 and 7,984.78

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Solution

The fourth proportional to 30,169.69, 45,250.62 and 7,984.78 is: 11,976.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,169.69 : 45,250.62 = 7,984.78 : x
  2. Step 2: Convert to fraction form
    30,169.69/45,250.62 = 7,984.78/x
  3. Step 3: Cross multiply
    30,169.69x = 45,250.62 × 7,984.78
  4. Step 4: Simplify right side
    30,169.69x = 361,316,169.87
  5. Step 5: Solve for x
    x = 361,316,169.87/30,169.69
  6. Step 6: Final answer
    x = 11,976.13

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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.