Home / 20,861.96-28,790.58-11,429.96

Finding the Fourth Proportional to 20,861.96, 28,790.58 and 11,429.96

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Solution

The fourth proportional to 20,861.96, 28,790.58 and 11,429.96 is: 15,773.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861.96 : 28,790.58 = 11,429.96 : x
  2. Step 2: Convert to fraction form
    20,861.96/28,790.58 = 11,429.96/x
  3. Step 3: Cross multiply
    20,861.96x = 28,790.58 × 11,429.96
  4. Step 4: Simplify right side
    20,861.96x = 329,075,177.78
  5. Step 5: Solve for x
    x = 329,075,177.78/20,861.96
  6. Step 6: Final answer
    x = 15,773.93

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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.