Home / 20,823.48-31,239.72-7,675.92

Finding the Fourth Proportional to 20,823.48, 31,239.72 and 7,675.92

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Solution

The fourth proportional to 20,823.48, 31,239.72 and 7,675.92 is: 11,515.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,823.48 : 31,239.72 = 7,675.92 : x
  2. Step 2: Convert to fraction form
    20,823.48/31,239.72 = 7,675.92/x
  3. Step 3: Cross multiply
    20,823.48x = 31,239.72 × 7,675.92
  4. Step 4: Simplify right side
    20,823.48x = 239,793,591.54
  5. Step 5: Solve for x
    x = 239,793,591.54/20,823.48
  6. Step 6: Final answer
    x = 11,515.54

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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.