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Finding the Fourth Proportional to 19,879.97, 27,435.08 and 10,928.15

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Solution

The fourth proportional to 19,879.97, 27,435.08 and 10,928.15 is: 15,081.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,879.97 : 27,435.08 = 10,928.15 : x
  2. Step 2: Convert to fraction form
    19,879.97/27,435.08 = 10,928.15/x
  3. Step 3: Cross multiply
    19,879.97x = 27,435.08 × 10,928.15
  4. Step 4: Simplify right side
    19,879.97x = 299,814,614.86
  5. Step 5: Solve for x
    x = 299,814,614.86/19,879.97
  6. Step 6: Final answer
    x = 15,081.24

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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.