Home / 30,168.45-45,178.83-21,261.90

Finding the Fourth Proportional to 30,168.45, 45,178.83 and 21,261.90

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Solution

The fourth proportional to 30,168.45, 45,178.83 and 21,261.90 is: 31,840.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,168.45 : 45,178.83 = 21,261.90 : x
  2. Step 2: Convert to fraction form
    30,168.45/45,178.83 = 21,261.90/x
  3. Step 3: Cross multiply
    30,168.45x = 45,178.83 × 21,261.90
  4. Step 4: Simplify right side
    30,168.45x = 960,587,765.58
  5. Step 5: Solve for x
    x = 960,587,765.58/30,168.45
  6. Step 6: Final answer
    x = 31,840.81

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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.