Home / 20,788.75-31,164.09-7,631.11

Finding the Fourth Proportional to 20,788.75, 31,164.09 and 7,631.11

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Solution

The fourth proportional to 20,788.75, 31,164.09 and 7,631.11 is: 11,439.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.75 : 31,164.09 = 7,631.11 : x
  2. Step 2: Convert to fraction form
    20,788.75/31,164.09 = 7,631.11/x
  3. Step 3: Cross multiply
    20,788.75x = 31,164.09 × 7,631.11
  4. Step 4: Simplify right side
    20,788.75x = 237,816,598.84
  5. Step 5: Solve for x
    x = 237,816,598.84/20,788.75
  6. Step 6: Final answer
    x = 11,439.68

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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.