Home / 20,366.16-28,103.88-11,291.43

Finding the Fourth Proportional to 20,366.16, 28,103.88 and 11,291.43

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Solution

The fourth proportional to 20,366.16, 28,103.88 and 11,291.43 is: 15,581.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,366.16 : 28,103.88 = 11,291.43 : x
  2. Step 2: Convert to fraction form
    20,366.16/28,103.88 = 11,291.43/x
  3. Step 3: Cross multiply
    20,366.16x = 28,103.88 × 11,291.43
  4. Step 4: Simplify right side
    20,366.16x = 317,332,993.75
  5. Step 5: Solve for x
    x = 317,332,993.75/20,366.16
  6. Step 6: Final answer
    x = 15,581.39

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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.