Home / 30,120.43-45,172.75-9,054.83

Finding the Fourth Proportional to 30,120.43, 45,172.75 and 9,054.83

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Solution

The fourth proportional to 30,120.43, 45,172.75 and 9,054.83 is: 13,579.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,120.43 : 45,172.75 = 9,054.83 : x
  2. Step 2: Convert to fraction form
    30,120.43/45,172.75 = 9,054.83/x
  3. Step 3: Cross multiply
    30,120.43x = 45,172.75 × 9,054.83
  4. Step 4: Simplify right side
    30,120.43x = 409,031,571.88
  5. Step 5: Solve for x
    x = 409,031,571.88/30,120.43
  6. Step 6: Final answer
    x = 13,579.87

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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.