Home / 20,604.63-28,434.27-11,173.20

Finding the Fourth Proportional to 20,604.63, 28,434.27 and 11,173.20

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Solution

The fourth proportional to 20,604.63, 28,434.27 and 11,173.20 is: 15,418.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,604.63 : 28,434.27 = 11,173.20 : x
  2. Step 2: Convert to fraction form
    20,604.63/28,434.27 = 11,173.20/x
  3. Step 3: Cross multiply
    20,604.63x = 28,434.27 × 11,173.20
  4. Step 4: Simplify right side
    20,604.63x = 317,701,785.56
  5. Step 5: Solve for x
    x = 317,701,785.56/20,604.63
  6. Step 6: Final answer
    x = 15,418.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.