Home / 20,280.64-27,976.80-12,832.96

Finding the Fourth Proportional to 20,280.64, 27,976.80 and 12,832.96

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Solution

The fourth proportional to 20,280.64, 27,976.80 and 12,832.96 is: 17,702.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.64 : 27,976.80 = 12,832.96 : x
  2. Step 2: Convert to fraction form
    20,280.64/27,976.80 = 12,832.96/x
  3. Step 3: Cross multiply
    20,280.64x = 27,976.80 × 12,832.96
  4. Step 4: Simplify right side
    20,280.64x = 359,025,155.33
  5. Step 5: Solve for x
    x = 359,025,155.33/20,280.64
  6. Step 6: Final answer
    x = 17,702.85

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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.