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Finding the Fourth Proportional to 19,991.82, 30,006.02 and 10,137.90

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Solution

The fourth proportional to 19,991.82, 30,006.02 and 10,137.90 is: 15,216.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,991.82 : 30,006.02 = 10,137.90 : x
  2. Step 2: Convert to fraction form
    19,991.82/30,006.02 = 10,137.90/x
  3. Step 3: Cross multiply
    19,991.82x = 30,006.02 × 10,137.90
  4. Step 4: Simplify right side
    19,991.82x = 304,198,030.16
  5. Step 5: Solve for x
    x = 304,198,030.16/19,991.82
  6. Step 6: Final answer
    x = 15,216.12

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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.