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Finding the Fourth Proportional to 18,661.19, 25,744.12 and 12,609.48

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Solution

The fourth proportional to 18,661.19, 25,744.12 and 12,609.48 is: 17,395.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,661.19 : 25,744.12 = 12,609.48 : x
  2. Step 2: Convert to fraction form
    18,661.19/25,744.12 = 12,609.48/x
  3. Step 3: Cross multiply
    18,661.19x = 25,744.12 × 12,609.48
  4. Step 4: Simplify right side
    18,661.19x = 324,619,966.26
  5. Step 5: Solve for x
    x = 324,619,966.26/18,661.19
  6. Step 6: Final answer
    x = 17,395.46

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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.