Home / 30,179.56-45,269.77-9,119.78

Finding the Fourth Proportional to 30,179.56, 45,269.77 and 9,119.78

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Solution

The fourth proportional to 30,179.56, 45,269.77 and 9,119.78 is: 13,679.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,179.56 : 45,269.77 = 9,119.78 : x
  2. Step 2: Convert to fraction form
    30,179.56/45,269.77 = 9,119.78/x
  3. Step 3: Cross multiply
    30,179.56x = 45,269.77 × 9,119.78
  4. Step 4: Simplify right side
    30,179.56x = 412,850,116.70
  5. Step 5: Solve for x
    x = 412,850,116.70/30,179.56
  6. Step 6: Final answer
    x = 13,679.79

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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.