Home / 20,781.69-28,671.61-11,826.96

Finding the Fourth Proportional to 20,781.69, 28,671.61 and 11,826.96

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Solution

The fourth proportional to 20,781.69, 28,671.61 and 11,826.96 is: 16,317.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781.69 : 28,671.61 = 11,826.96 : x
  2. Step 2: Convert to fraction form
    20,781.69/28,671.61 = 11,826.96/x
  3. Step 3: Cross multiply
    20,781.69x = 28,671.61 × 11,826.96
  4. Step 4: Simplify right side
    20,781.69x = 339,097,984.61
  5. Step 5: Solve for x
    x = 339,097,984.61/20,781.69
  6. Step 6: Final answer
    x = 16,317.15

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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.