Home / 20,637.93-30,939.11-8,780.85

Finding the Fourth Proportional to 20,637.93, 30,939.11 and 8,780.85

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Solution

The fourth proportional to 20,637.93, 30,939.11 and 8,780.85 is: 13,163.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,637.93 : 30,939.11 = 8,780.85 : x
  2. Step 2: Convert to fraction form
    20,637.93/30,939.11 = 8,780.85/x
  3. Step 3: Cross multiply
    20,637.93x = 30,939.11 × 8,780.85
  4. Step 4: Simplify right side
    20,637.93x = 271,671,684.04
  5. Step 5: Solve for x
    x = 271,671,684.04/20,637.93
  6. Step 6: Final answer
    x = 13,163.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.