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Finding the Fourth Proportional to 19,900.39, 27,457.09 and 12,343.09

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Solution

The fourth proportional to 19,900.39, 27,457.09 and 12,343.09 is: 17,030.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,900.39 : 27,457.09 = 12,343.09 : x
  2. Step 2: Convert to fraction form
    19,900.39/27,457.09 = 12,343.09/x
  3. Step 3: Cross multiply
    19,900.39x = 27,457.09 × 12,343.09
  4. Step 4: Simplify right side
    19,900.39x = 338,905,333.01
  5. Step 5: Solve for x
    x = 338,905,333.01/19,900.39
  6. Step 6: Final answer
    x = 17,030.08

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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.