Home / 20,769.20-31,153.69-5,186.82

Finding the Fourth Proportional to 20,769.20, 31,153.69 and 5,186.82

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Solution

The fourth proportional to 20,769.20, 31,153.69 and 5,186.82 is: 7,780.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,769.20 : 31,153.69 = 5,186.82 : x
  2. Step 2: Convert to fraction form
    20,769.20/31,153.69 = 5,186.82/x
  3. Step 3: Cross multiply
    20,769.20x = 31,153.69 × 5,186.82
  4. Step 4: Simplify right side
    20,769.20x = 161,588,582.37
  5. Step 5: Solve for x
    x = 161,588,582.37/20,769.20
  6. Step 6: Final answer
    x = 7,780.20

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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.