Home / 20,660.20-31,004.70-13,282.60

Finding the Fourth Proportional to 20,660.20, 31,004.70 and 13,282.60

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Solution

The fourth proportional to 20,660.20, 31,004.70 and 13,282.60 is: 19,933.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.20 : 31,004.70 = 13,282.60 : x
  2. Step 2: Convert to fraction form
    20,660.20/31,004.70 = 13,282.60/x
  3. Step 3: Cross multiply
    20,660.20x = 31,004.70 × 13,282.60
  4. Step 4: Simplify right side
    20,660.20x = 411,823,028.22
  5. Step 5: Solve for x
    x = 411,823,028.22/20,660.20
  6. Step 6: Final answer
    x = 19,933.16

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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.