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Finding the Fourth Proportional to 27,998.40, 42,046.20 and 19,736.40

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Solution

The fourth proportional to 27,998.40, 42,046.20 and 19,736.40 is: 29,638.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,998.40 : 42,046.20 = 19,736.40 : x
  2. Step 2: Convert to fraction form
    27,998.40/42,046.20 = 19,736.40/x
  3. Step 3: Cross multiply
    27,998.40x = 42,046.20 × 19,736.40
  4. Step 4: Simplify right side
    27,998.40x = 829,840,621.68
  5. Step 5: Solve for x
    x = 829,840,621.68/27,998.40
  6. Step 6: Final answer
    x = 29,638.86

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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.