Home / 20,801.22-28,697.52-12,829.56

Finding the Fourth Proportional to 20,801.22, 28,697.52 and 12,829.56

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Solution

The fourth proportional to 20,801.22, 28,697.52 and 12,829.56 is: 17,699.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801.22 : 28,697.52 = 12,829.56 : x
  2. Step 2: Convert to fraction form
    20,801.22/28,697.52 = 12,829.56/x
  3. Step 3: Cross multiply
    20,801.22x = 28,697.52 × 12,829.56
  4. Step 4: Simplify right side
    20,801.22x = 368,176,554.69
  5. Step 5: Solve for x
    x = 368,176,554.69/20,801.22
  6. Step 6: Final answer
    x = 17,699.76

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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.