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Finding the Fourth Proportional to 20,328.48, 28,053.12 and 11,375.88

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Solution

The fourth proportional to 20,328.48, 28,053.12 and 11,375.88 is: 15,698.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,328.48 : 28,053.12 = 11,375.88 : x
  2. Step 2: Convert to fraction form
    20,328.48/28,053.12 = 11,375.88/x
  3. Step 3: Cross multiply
    20,328.48x = 28,053.12 × 11,375.88
  4. Step 4: Simplify right side
    20,328.48x = 319,128,926.75
  5. Step 5: Solve for x
    x = 319,128,926.75/20,328.48
  6. Step 6: Final answer
    x = 15,698.61

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.