Home / 20,771.67-28,665.45-11,340.84

Finding the Fourth Proportional to 20,771.67, 28,665.45 and 11,340.84

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Solution

The fourth proportional to 20,771.67, 28,665.45 and 11,340.84 is: 15,650.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,771.67 : 28,665.45 = 11,340.84 : x
  2. Step 2: Convert to fraction form
    20,771.67/28,665.45 = 11,340.84/x
  3. Step 3: Cross multiply
    20,771.67x = 28,665.45 × 11,340.84
  4. Step 4: Simplify right side
    20,771.67x = 325,090,281.98
  5. Step 5: Solve for x
    x = 325,090,281.98/20,771.67
  6. Step 6: Final answer
    x = 15,650.66

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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.