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Finding the Fourth Proportional to 18,785.97, 25,902.63 and 14,996.99

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Solution

The fourth proportional to 18,785.97, 25,902.63 and 14,996.99 is: 20,678.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,785.97 : 25,902.63 = 14,996.99 : x
  2. Step 2: Convert to fraction form
    18,785.97/25,902.63 = 14,996.99/x
  3. Step 3: Cross multiply
    18,785.97x = 25,902.63 × 14,996.99
  4. Step 4: Simplify right side
    18,785.97x = 388,461,547.84
  5. Step 5: Solve for x
    x = 388,461,547.84/18,785.97
  6. Step 6: Final answer
    x = 20,678.28

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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.