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Finding the Fourth Proportional to 16,781.80, 25,143.90 and 10,935.40

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Solution

The fourth proportional to 16,781.80, 25,143.90 and 10,935.40 is: 16,384.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,781.80 : 25,143.90 = 10,935.40 : x
  2. Step 2: Convert to fraction form
    16,781.80/25,143.90 = 10,935.40/x
  3. Step 3: Cross multiply
    16,781.80x = 25,143.90 × 10,935.40
  4. Step 4: Simplify right side
    16,781.80x = 274,958,604.06
  5. Step 5: Solve for x
    x = 274,958,604.06/16,781.80
  6. Step 6: Final answer
    x = 16,384.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.