Home / 20,781.94-28,671.96-11,827.19

Finding the Fourth Proportional to 20,781.94, 28,671.96 and 11,827.19

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Solution

The fourth proportional to 20,781.94, 28,671.96 and 11,827.19 is: 16,317.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781.94 : 28,671.96 = 11,827.19 : x
  2. Step 2: Convert to fraction form
    20,781.94/28,671.96 = 11,827.19/x
  3. Step 3: Cross multiply
    20,781.94x = 28,671.96 × 11,827.19
  4. Step 4: Simplify right side
    20,781.94x = 339,108,718.59
  5. Step 5: Solve for x
    x = 339,108,718.59/20,781.94
  6. Step 6: Final answer
    x = 16,317.48

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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.