Home / 20,766.31-28,657.25-11,813.79

Finding the Fourth Proportional to 20,766.31, 28,657.25 and 11,813.79

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Solution

The fourth proportional to 20,766.31, 28,657.25 and 11,813.79 is: 16,302.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,766.31 : 28,657.25 = 11,813.79 : x
  2. Step 2: Convert to fraction form
    20,766.31/28,657.25 = 11,813.79/x
  3. Step 3: Cross multiply
    20,766.31x = 28,657.25 × 11,813.79
  4. Step 4: Simplify right side
    20,766.31x = 338,550,895.77
  5. Step 5: Solve for x
    x = 338,550,895.77/20,766.31
  6. Step 6: Final answer
    x = 16,302.89

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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.