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Finding the Fourth Proportional to 19,999.98, 29,998.21 and 18,433.98

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Solution

The fourth proportional to 19,999.98, 29,998.21 and 18,433.98 is: 27,649.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,999.98 : 29,998.21 = 18,433.98 : x
  2. Step 2: Convert to fraction form
    19,999.98/29,998.21 = 18,433.98/x
  3. Step 3: Cross multiply
    19,999.98x = 29,998.21 × 18,433.98
  4. Step 4: Simplify right side
    19,999.98x = 552,986,403.18
  5. Step 5: Solve for x
    x = 552,986,403.18/19,999.98
  6. Step 6: Final answer
    x = 27,649.35

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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.