Home / 30,331.80-45,449.10-19,218.60

Finding the Fourth Proportional to 30,331.80, 45,449.10 and 19,218.60

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Solution

The fourth proportional to 30,331.80, 45,449.10 and 19,218.60 is: 28,797.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,331.80 : 45,449.10 = 19,218.60 : x
  2. Step 2: Convert to fraction form
    30,331.80/45,449.10 = 19,218.60/x
  3. Step 3: Cross multiply
    30,331.80x = 45,449.10 × 19,218.60
  4. Step 4: Simplify right side
    30,331.80x = 873,468,073.26
  5. Step 5: Solve for x
    x = 873,468,073.26/30,331.80
  6. Step 6: Final answer
    x = 28,797.11

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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.