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Finding the Fourth Proportional to 20,542.96, 28,349.60 and 11,590.88

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Solution

The fourth proportional to 20,542.96, 28,349.60 and 11,590.88 is: 15,995.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,542.96 : 28,349.60 = 11,590.88 : x
  2. Step 2: Convert to fraction form
    20,542.96/28,349.60 = 11,590.88/x
  3. Step 3: Cross multiply
    20,542.96x = 28,349.60 × 11,590.88
  4. Step 4: Simplify right side
    20,542.96x = 328,596,811.65
  5. Step 5: Solve for x
    x = 328,596,811.65/20,542.96
  6. Step 6: Final answer
    x = 15,995.59

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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.