Home / 20,775.29-31,161.09-5,192.90

Finding the Fourth Proportional to 20,775.29, 31,161.09 and 5,192.90

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Solution

The fourth proportional to 20,775.29, 31,161.09 and 5,192.90 is: 7,788.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,775.29 : 31,161.09 = 5,192.90 : x
  2. Step 2: Convert to fraction form
    20,775.29/31,161.09 = 5,192.90/x
  3. Step 3: Cross multiply
    20,775.29x = 31,161.09 × 5,192.90
  4. Step 4: Simplify right side
    20,775.29x = 161,816,424.26
  5. Step 5: Solve for x
    x = 161,816,424.26/20,775.29
  6. Step 6: Final answer
    x = 7,788.89

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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.