Home / 51,186.87-76,780.31-20,000.25

Finding the Fourth Proportional to 51,186.87, 76,780.31 and 20,000.25

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Solution

The fourth proportional to 51,186.87, 76,780.31 and 20,000.25 is: 30,000.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,186.87 : 76,780.31 = 20,000.25 : x
  2. Step 2: Convert to fraction form
    51,186.87/76,780.31 = 20,000.25/x
  3. Step 3: Cross multiply
    51,186.87x = 76,780.31 × 20,000.25
  4. Step 4: Simplify right side
    51,186.87x = 1,535,625,295.08
  5. Step 5: Solve for x
    x = 1,535,625,295.08/51,186.87
  6. Step 6: Final answer
    x = 30,000.38

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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.