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Finding the Fourth Proportional to 20,797.57, 28,711.23 and 12,844.41

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Solution

The fourth proportional to 20,797.57, 28,711.23 and 12,844.41 is: 17,731.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,797.57 : 28,711.23 = 12,844.41 : x
  2. Step 2: Convert to fraction form
    20,797.57/28,711.23 = 12,844.41/x
  3. Step 3: Cross multiply
    20,797.57x = 28,711.23 × 12,844.41
  4. Step 4: Simplify right side
    20,797.57x = 368,778,809.72
  5. Step 5: Solve for x
    x = 368,778,809.72/20,797.57
  6. Step 6: Final answer
    x = 17,731.82

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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.