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Finding the Fourth Proportional to 12,918.97, 19,380.49 and 5,523.47

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Solution

The fourth proportional to 12,918.97, 19,380.49 and 5,523.47 is: 8,286.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,918.97 : 19,380.49 = 5,523.47 : x
  2. Step 2: Convert to fraction form
    12,918.97/19,380.49 = 5,523.47/x
  3. Step 3: Cross multiply
    12,918.97x = 19,380.49 × 5,523.47
  4. Step 4: Simplify right side
    12,918.97x = 107,047,541.29
  5. Step 5: Solve for x
    x = 107,047,541.29/12,918.97
  6. Step 6: Final answer
    x = 8,286.07

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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.