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Finding the Fourth Proportional to 18,411.51, 25,399.80 and 12,441

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Solution

The fourth proportional to 18,411.51, 25,399.80 and 12,441 is: 17,163.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,411.51 : 25,399.80 = 12,441 : x
  2. Step 2: Convert to fraction form
    18,411.51/25,399.80 = 12,441/x
  3. Step 3: Cross multiply
    18,411.51x = 25,399.80 × 12,441
  4. Step 4: Simplify right side
    18,411.51x = 315,998,911.80
  5. Step 5: Solve for x
    x = 315,998,911.80/18,411.51
  6. Step 6: Final answer
    x = 17,163.12

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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.