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Finding the Fourth Proportional to 19,992.35, 29,988.68 and 7,515.20

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Solution

The fourth proportional to 19,992.35, 29,988.68 and 7,515.20 is: 11,272.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,992.35 : 29,988.68 = 7,515.20 : x
  2. Step 2: Convert to fraction form
    19,992.35/29,988.68 = 7,515.20/x
  3. Step 3: Cross multiply
    19,992.35x = 29,988.68 × 7,515.20
  4. Step 4: Simplify right side
    19,992.35x = 225,370,965.33
  5. Step 5: Solve for x
    x = 225,370,965.33/19,992.35
  6. Step 6: Final answer
    x = 11,272.86

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.