Home / 20,823.38-31,238.31-6,780.09

Finding the Fourth Proportional to 20,823.38, 31,238.31 and 6,780.09

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Solution

The fourth proportional to 20,823.38, 31,238.31 and 6,780.09 is: 10,171.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,823.38 : 31,238.31 = 6,780.09 : x
  2. Step 2: Convert to fraction form
    20,823.38/31,238.31 = 6,780.09/x
  3. Step 3: Cross multiply
    20,823.38x = 31,238.31 × 6,780.09
  4. Step 4: Simplify right side
    20,823.38x = 211,798,436.10
  5. Step 5: Solve for x
    x = 211,798,436.10/20,823.38
  6. Step 6: Final answer
    x = 10,171.19

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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.