Home / 30,121.88-45,185.34-10,400.60

Finding the Fourth Proportional to 30,121.88, 45,185.34 and 10,400.60

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Solution

The fourth proportional to 30,121.88, 45,185.34 and 10,400.60 is: 15,601.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,121.88 : 45,185.34 = 10,400.60 : x
  2. Step 2: Convert to fraction form
    30,121.88/45,185.34 = 10,400.60/x
  3. Step 3: Cross multiply
    30,121.88x = 45,185.34 × 10,400.60
  4. Step 4: Simplify right side
    30,121.88x = 469,954,647.20
  5. Step 5: Solve for x
    x = 469,954,647.20/30,121.88
  6. Step 6: Final answer
    x = 15,601.77

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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.