Home / 20,954.40-31,399.20-14,020.80

Finding the Fourth Proportional to 20,954.40, 31,399.20 and 14,020.80

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Solution

The fourth proportional to 20,954.40, 31,399.20 and 14,020.80 is: 21,009.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,954.40 : 31,399.20 = 14,020.80 : x
  2. Step 2: Convert to fraction form
    20,954.40/31,399.20 = 14,020.80/x
  3. Step 3: Cross multiply
    20,954.40x = 31,399.20 × 14,020.80
  4. Step 4: Simplify right side
    20,954.40x = 440,241,903.36
  5. Step 5: Solve for x
    x = 440,241,903.36/20,954.40
  6. Step 6: Final answer
    x = 21,009.52

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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.