Home / 20,728.44-28,603.86-12,230.12

Finding the Fourth Proportional to 20,728.44, 28,603.86 and 12,230.12

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Solution

The fourth proportional to 20,728.44, 28,603.86 and 12,230.12 is: 16,876.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.44 : 28,603.86 = 12,230.12 : x
  2. Step 2: Convert to fraction form
    20,728.44/28,603.86 = 12,230.12/x
  3. Step 3: Cross multiply
    20,728.44x = 28,603.86 × 12,230.12
  4. Step 4: Simplify right side
    20,728.44x = 349,828,640.26
  5. Step 5: Solve for x
    x = 349,828,640.26/20,728.44
  6. Step 6: Final answer
    x = 16,876.75

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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.