Home / 20,845.67-28,766.80-11,285.34

Finding the Fourth Proportional to 20,845.67, 28,766.80 and 11,285.34

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Solution

The fourth proportional to 20,845.67, 28,766.80 and 11,285.34 is: 15,573.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,845.67 : 28,766.80 = 11,285.34 : x
  2. Step 2: Convert to fraction form
    20,845.67/28,766.80 = 11,285.34/x
  3. Step 3: Cross multiply
    20,845.67x = 28,766.80 × 11,285.34
  4. Step 4: Simplify right side
    20,845.67x = 324,643,118.71
  5. Step 5: Solve for x
    x = 324,643,118.71/20,845.67
  6. Step 6: Final answer
    x = 15,573.65

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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.