Home / 28,971.06-39,984.11-20,930.73

Finding the Fourth Proportional to 28,971.06, 39,984.11 and 20,930.73

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Solution

The fourth proportional to 28,971.06, 39,984.11 and 20,930.73 is: 28,887.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,971.06 : 39,984.11 = 20,930.73 : x
  2. Step 2: Convert to fraction form
    28,971.06/39,984.11 = 20,930.73/x
  3. Step 3: Cross multiply
    28,971.06x = 39,984.11 × 20,930.73
  4. Step 4: Simplify right side
    28,971.06x = 836,896,610.70
  5. Step 5: Solve for x
    x = 836,896,610.70/28,971.06
  6. Step 6: Final answer
    x = 28,887.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.