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Finding the Fourth Proportional to 20,457.27, 28,230.77 and 11,504.77

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Solution

The fourth proportional to 20,457.27, 28,230.77 and 11,504.77 is: 15,876.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,457.27 : 28,230.77 = 11,504.77 : x
  2. Step 2: Convert to fraction form
    20,457.27/28,230.77 = 11,504.77/x
  3. Step 3: Cross multiply
    20,457.27x = 28,230.77 × 11,504.77
  4. Step 4: Simplify right side
    20,457.27x = 324,788,515.77
  5. Step 5: Solve for x
    x = 324,788,515.77/20,457.27
  6. Step 6: Final answer
    x = 15,876.43

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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.