Home / 20,780.15-31,163.13-5,985.09

Finding the Fourth Proportional to 20,780.15, 31,163.13 and 5,985.09

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Solution

The fourth proportional to 20,780.15, 31,163.13 and 5,985.09 is: 8,975.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.15 : 31,163.13 = 5,985.09 : x
  2. Step 2: Convert to fraction form
    20,780.15/31,163.13 = 5,985.09/x
  3. Step 3: Cross multiply
    20,780.15x = 31,163.13 × 5,985.09
  4. Step 4: Simplify right side
    20,780.15x = 186,514,137.73
  5. Step 5: Solve for x
    x = 186,514,137.73/20,780.15
  6. Step 6: Final answer
    x = 8,975.59

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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.