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Finding the Fourth Proportional to 18,637.43, 25,715.42 and 13,604.39

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Solution

The fourth proportional to 18,637.43, 25,715.42 and 13,604.39 is: 18,770.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,637.43 : 25,715.42 = 13,604.39 : x
  2. Step 2: Convert to fraction form
    18,637.43/25,715.42 = 13,604.39/x
  3. Step 3: Cross multiply
    18,637.43x = 25,715.42 × 13,604.39
  4. Step 4: Simplify right side
    18,637.43x = 349,842,630.07
  5. Step 5: Solve for x
    x = 349,842,630.07/18,637.43
  6. Step 6: Final answer
    x = 18,770.97

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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.