Home / 20,357.76-28,091.40-11,861.66

Finding the Fourth Proportional to 20,357.76, 28,091.40 and 11,861.66

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Solution

The fourth proportional to 20,357.76, 28,091.40 and 11,861.66 is: 16,367.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,357.76 : 28,091.40 = 11,861.66 : x
  2. Step 2: Convert to fraction form
    20,357.76/28,091.40 = 11,861.66/x
  3. Step 3: Cross multiply
    20,357.76x = 28,091.40 × 11,861.66
  4. Step 4: Simplify right side
    20,357.76x = 333,210,635.72
  5. Step 5: Solve for x
    x = 333,210,635.72/20,357.76
  6. Step 6: Final answer
    x = 16,367.75

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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.