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Finding the Fourth Proportional to 18,172.82, 25,071.39 and 13,404.11

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Solution

The fourth proportional to 18,172.82, 25,071.39 and 13,404.11 is: 18,492.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,172.82 : 25,071.39 = 13,404.11 : x
  2. Step 2: Convert to fraction form
    18,172.82/25,071.39 = 13,404.11/x
  3. Step 3: Cross multiply
    18,172.82x = 25,071.39 × 13,404.11
  4. Step 4: Simplify right side
    18,172.82x = 336,059,614.57
  5. Step 5: Solve for x
    x = 336,059,614.57/18,172.82
  6. Step 6: Final answer
    x = 18,492.43

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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.