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Finding the Fourth Proportional to 19,998.44, 29,934.72 and 13,721.76

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Solution

The fourth proportional to 19,998.44, 29,934.72 and 13,721.76 is: 20,539.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,998.44 : 29,934.72 = 13,721.76 : x
  2. Step 2: Convert to fraction form
    19,998.44/29,934.72 = 13,721.76/x
  3. Step 3: Cross multiply
    19,998.44x = 29,934.72 × 13,721.76
  4. Step 4: Simplify right side
    19,998.44x = 410,757,043.51
  5. Step 5: Solve for x
    x = 410,757,043.51/19,998.44
  6. Step 6: Final answer
    x = 20,539.45

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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.