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Finding the Fourth Proportional to 19,793.80, 27,308.10 and 12,724.12

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Solution

The fourth proportional to 19,793.80, 27,308.10 and 12,724.12 is: 17,554.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,793.80 : 27,308.10 = 12,724.12 : x
  2. Step 2: Convert to fraction form
    19,793.80/27,308.10 = 12,724.12/x
  3. Step 3: Cross multiply
    19,793.80x = 27,308.10 × 12,724.12
  4. Step 4: Simplify right side
    19,793.80x = 347,471,541.37
  5. Step 5: Solve for x
    x = 347,471,541.37/19,793.80
  6. Step 6: Final answer
    x = 17,554.56

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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.