Home / 20,862.18-28,789.67-11,790.50

Finding the Fourth Proportional to 20,862.18, 28,789.67 and 11,790.50

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Solution

The fourth proportional to 20,862.18, 28,789.67 and 11,790.50 is: 16,270.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862.18 : 28,789.67 = 11,790.50 : x
  2. Step 2: Convert to fraction form
    20,862.18/28,789.67 = 11,790.50/x
  3. Step 3: Cross multiply
    20,862.18x = 28,789.67 × 11,790.50
  4. Step 4: Simplify right side
    20,862.18x = 339,444,489.66
  5. Step 5: Solve for x
    x = 339,444,489.66/20,862.18
  6. Step 6: Final answer
    x = 16,270.81

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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.