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Finding the Fourth Proportional to 30,239.88, 45,359.88 and 9,180.09

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Solution

The fourth proportional to 30,239.88, 45,359.88 and 9,180.09 is: 13,770.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,239.88 : 45,359.88 = 9,180.09 : x
  2. Step 2: Convert to fraction form
    30,239.88/45,359.88 = 9,180.09/x
  3. Step 3: Cross multiply
    30,239.88x = 45,359.88 × 9,180.09
  4. Step 4: Simplify right side
    30,239.88x = 416,407,780.79
  5. Step 5: Solve for x
    x = 416,407,780.79/30,239.88
  6. Step 6: Final answer
    x = 13,770.15

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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.