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Finding the Fourth Proportional to 18,138.69, 25,030.04 and 10,072.80

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Solution

The fourth proportional to 18,138.69, 25,030.04 and 10,072.80 is: 13,899.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.69 : 25,030.04 = 10,072.80 : x
  2. Step 2: Convert to fraction form
    18,138.69/25,030.04 = 10,072.80/x
  3. Step 3: Cross multiply
    18,138.69x = 25,030.04 × 10,072.80
  4. Step 4: Simplify right side
    18,138.69x = 252,122,536.55
  5. Step 5: Solve for x
    x = 252,122,536.55/18,138.69
  6. Step 6: Final answer
    x = 13,899.71

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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.