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Finding the Fourth Proportional to 20,145.71, 27,801.02 and 12,185.64

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Solution

The fourth proportional to 20,145.71, 27,801.02 and 12,185.64 is: 16,816.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,145.71 : 27,801.02 = 12,185.64 : x
  2. Step 2: Convert to fraction form
    20,145.71/27,801.02 = 12,185.64/x
  3. Step 3: Cross multiply
    20,145.71x = 27,801.02 × 12,185.64
  4. Step 4: Simplify right side
    20,145.71x = 338,773,251.82
  5. Step 5: Solve for x
    x = 338,773,251.82/20,145.71
  6. Step 6: Final answer
    x = 16,816.15

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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.