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Finding the Fourth Proportional to 19,992.62, 29,985.29 and 8,889.95

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Solution

The fourth proportional to 19,992.62, 29,985.29 and 8,889.95 is: 13,333.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,992.62 : 29,985.29 = 8,889.95 : x
  2. Step 2: Convert to fraction form
    19,992.62/29,985.29 = 8,889.95/x
  3. Step 3: Cross multiply
    19,992.62x = 29,985.29 × 8,889.95
  4. Step 4: Simplify right side
    19,992.62x = 266,567,792.69
  5. Step 5: Solve for x
    x = 266,567,792.69/19,992.62
  6. Step 6: Final answer
    x = 13,333.31

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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.