Home / 20,822.55-28,735.80-11,869.89

Finding the Fourth Proportional to 20,822.55, 28,735.80 and 11,869.89

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Solution

The fourth proportional to 20,822.55, 28,735.80 and 11,869.89 is: 16,380.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,822.55 : 28,735.80 = 11,869.89 : x
  2. Step 2: Convert to fraction form
    20,822.55/28,735.80 = 11,869.89/x
  3. Step 3: Cross multiply
    20,822.55x = 28,735.80 × 11,869.89
  4. Step 4: Simplify right side
    20,822.55x = 341,090,785.06
  5. Step 5: Solve for x
    x = 341,090,785.06/20,822.55
  6. Step 6: Final answer
    x = 16,380.84

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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.