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Finding the Fourth Proportional to 18,171.63, 25,084.94 and 12,798.90

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Solution

The fourth proportional to 18,171.63, 25,084.94 and 12,798.90 is: 17,668.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,171.63 : 25,084.94 = 12,798.90 : x
  2. Step 2: Convert to fraction form
    18,171.63/25,084.94 = 12,798.90/x
  3. Step 3: Cross multiply
    18,171.63x = 25,084.94 × 12,798.90
  4. Step 4: Simplify right side
    18,171.63x = 321,059,638.57
  5. Step 5: Solve for x
    x = 321,059,638.57/18,171.63
  6. Step 6: Final answer
    x = 17,668.18

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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.