Home / 20,906.76-28,851.32-11,475.92

Finding the Fourth Proportional to 20,906.76, 28,851.32 and 11,475.92

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Solution

The fourth proportional to 20,906.76, 28,851.32 and 11,475.92 is: 15,836.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,906.76 : 28,851.32 = 11,475.92 : x
  2. Step 2: Convert to fraction form
    20,906.76/28,851.32 = 11,475.92/x
  3. Step 3: Cross multiply
    20,906.76x = 28,851.32 × 11,475.92
  4. Step 4: Simplify right side
    20,906.76x = 331,095,440.21
  5. Step 5: Solve for x
    x = 331,095,440.21/20,906.76
  6. Step 6: Final answer
    x = 15,836.76

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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.