Home / 28,879.32-39,790.08-19,431.48

Finding the Fourth Proportional to 28,879.32, 39,790.08 and 19,431.48

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Solution

The fourth proportional to 28,879.32, 39,790.08 and 19,431.48 is: 26,772.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,879.32 : 39,790.08 = 19,431.48 : x
  2. Step 2: Convert to fraction form
    28,879.32/39,790.08 = 19,431.48/x
  3. Step 3: Cross multiply
    28,879.32x = 39,790.08 × 19,431.48
  4. Step 4: Simplify right side
    28,879.32x = 773,180,143.72
  5. Step 5: Solve for x
    x = 773,180,143.72/28,879.32
  6. Step 6: Final answer
    x = 26,772.80

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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.