Home / 20,789.55-28,689.61-11,837.06

Finding the Fourth Proportional to 20,789.55, 28,689.61 and 11,837.06

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Solution

The fourth proportional to 20,789.55, 28,689.61 and 11,837.06 is: 16,335.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.55 : 28,689.61 = 11,837.06 : x
  2. Step 2: Convert to fraction form
    20,789.55/28,689.61 = 11,837.06/x
  3. Step 3: Cross multiply
    20,789.55x = 28,689.61 × 11,837.06
  4. Step 4: Simplify right side
    20,789.55x = 339,600,432.31
  5. Step 5: Solve for x
    x = 339,600,432.31/20,789.55
  6. Step 6: Final answer
    x = 16,335.15

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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.