Home / 20,773.76-28,667.39-11,821.05

Finding the Fourth Proportional to 20,773.76, 28,667.39 and 11,821.05

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Solution

The fourth proportional to 20,773.76, 28,667.39 and 11,821.05 is: 16,312.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,773.76 : 28,667.39 = 11,821.05 : x
  2. Step 2: Convert to fraction form
    20,773.76/28,667.39 = 11,821.05/x
  3. Step 3: Cross multiply
    20,773.76x = 28,667.39 × 11,821.05
  4. Step 4: Simplify right side
    20,773.76x = 338,878,591.45
  5. Step 5: Solve for x
    x = 338,878,591.45/20,773.76
  6. Step 6: Final answer
    x = 16,312.82

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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.