Home / 20,431.28-30,628.42-14,194.21

Finding the Fourth Proportional to 20,431.28, 30,628.42 and 14,194.21

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Solution

The fourth proportional to 20,431.28, 30,628.42 and 14,194.21 is: 21,278.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,431.28 : 30,628.42 = 14,194.21 : x
  2. Step 2: Convert to fraction form
    20,431.28/30,628.42 = 14,194.21/x
  3. Step 3: Cross multiply
    20,431.28x = 30,628.42 × 14,194.21
  4. Step 4: Simplify right side
    20,431.28x = 434,746,225.45
  5. Step 5: Solve for x
    x = 434,746,225.45/20,431.28
  6. Step 6: Final answer
    x = 21,278.46

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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.