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Finding the Fourth Proportional to 19,991.61, 29,962.22 and 10,133.37

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Solution

The fourth proportional to 19,991.61, 29,962.22 and 10,133.37 is: 15,187.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,991.61 : 29,962.22 = 10,133.37 : x
  2. Step 2: Convert to fraction form
    19,991.61/29,962.22 = 10,133.37/x
  3. Step 3: Cross multiply
    19,991.61x = 29,962.22 × 10,133.37
  4. Step 4: Simplify right side
    19,991.61x = 303,618,210.61
  5. Step 5: Solve for x
    x = 303,618,210.61/19,991.61
  6. Step 6: Final answer
    x = 15,187.28

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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.