Home / 21,104.20-31,661.10-12,334.60

Finding the Fourth Proportional to 21,104.20, 31,661.10 and 12,334.60

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Solution

The fourth proportional to 21,104.20, 31,661.10 and 12,334.60 is: 18,504.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,104.20 : 31,661.10 = 12,334.60 : x
  2. Step 2: Convert to fraction form
    21,104.20/31,661.10 = 12,334.60/x
  3. Step 3: Cross multiply
    21,104.20x = 31,661.10 × 12,334.60
  4. Step 4: Simplify right side
    21,104.20x = 390,527,004.06
  5. Step 5: Solve for x
    x = 390,527,004.06/21,104.20
  6. Step 6: Final answer
    x = 18,504.71

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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.