Home / 20,728.22-28,603.52-12,228.39

Finding the Fourth Proportional to 20,728.22, 28,603.52 and 12,228.39

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Solution

The fourth proportional to 20,728.22, 28,603.52 and 12,228.39 is: 16,874.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.22 : 28,603.52 = 12,228.39 : x
  2. Step 2: Convert to fraction form
    20,728.22/28,603.52 = 12,228.39/x
  3. Step 3: Cross multiply
    20,728.22x = 28,603.52 × 12,228.39
  4. Step 4: Simplify right side
    20,728.22x = 349,774,854.92
  5. Step 5: Solve for x
    x = 349,774,854.92/20,728.22
  6. Step 6: Final answer
    x = 16,874.33

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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.