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Finding the Fourth Proportional to 20,797.97, 28,700.12 and 11,364.71

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Solution

The fourth proportional to 20,797.97, 28,700.12 and 11,364.71 is: 15,682.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,797.97 : 28,700.12 = 11,364.71 : x
  2. Step 2: Convert to fraction form
    20,797.97/28,700.12 = 11,364.71/x
  3. Step 3: Cross multiply
    20,797.97x = 28,700.12 × 11,364.71
  4. Step 4: Simplify right side
    20,797.97x = 326,168,425.68
  5. Step 5: Solve for x
    x = 326,168,425.68/20,797.97
  6. Step 6: Final answer
    x = 15,682.71

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Double scale
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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.