Home / 20,639.19-28,481.79-11,686.46

Finding the Fourth Proportional to 20,639.19, 28,481.79 and 11,686.46

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Solution

The fourth proportional to 20,639.19, 28,481.79 and 11,686.46 is: 16,127.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.19 : 28,481.79 = 11,686.46 : x
  2. Step 2: Convert to fraction form
    20,639.19/28,481.79 = 11,686.46/x
  3. Step 3: Cross multiply
    20,639.19x = 28,481.79 × 11,686.46
  4. Step 4: Simplify right side
    20,639.19x = 332,851,299.56
  5. Step 5: Solve for x
    x = 332,851,299.56/20,639.19
  6. Step 6: Final answer
    x = 16,127.15

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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.