Home / 20,789.57-28,689.60-11,837.05

Finding the Fourth Proportional to 20,789.57, 28,689.60 and 11,837.05

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Solution

The fourth proportional to 20,789.57, 28,689.60 and 11,837.05 is: 16,335.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.57 : 28,689.60 = 11,837.05 : x
  2. Step 2: Convert to fraction form
    20,789.57/28,689.60 = 11,837.05/x
  3. Step 3: Cross multiply
    20,789.57x = 28,689.60 × 11,837.05
  4. Step 4: Simplify right side
    20,789.57x = 339,600,237.75
  5. Step 5: Solve for x
    x = 339,600,237.75/20,789.57
  6. Step 6: Final answer
    x = 16,335.13

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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.