Home / 20,516.85-28,313.19-11,085.39

Finding the Fourth Proportional to 20,516.85, 28,313.19 and 11,085.39

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Solution

The fourth proportional to 20,516.85, 28,313.19 and 11,085.39 is: 15,297.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,516.85 : 28,313.19 = 11,085.39 : x
  2. Step 2: Convert to fraction form
    20,516.85/28,313.19 = 11,085.39/x
  3. Step 3: Cross multiply
    20,516.85x = 28,313.19 × 11,085.39
  4. Step 4: Simplify right side
    20,516.85x = 313,862,753.29
  5. Step 5: Solve for x
    x = 313,862,753.29/20,516.85
  6. Step 6: Final answer
    x = 15,297.80

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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.