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Finding the Fourth Proportional to 20,336.51, 28,044.66 and 15,858.62

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Solution

The fourth proportional to 20,336.51, 28,044.66 and 15,858.62 is: 21,869.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,336.51 : 28,044.66 = 15,858.62 : x
  2. Step 2: Convert to fraction form
    20,336.51/28,044.66 = 15,858.62/x
  3. Step 3: Cross multiply
    20,336.51x = 28,044.66 × 15,858.62
  4. Step 4: Simplify right side
    20,336.51x = 444,749,788.13
  5. Step 5: Solve for x
    x = 444,749,788.13/20,336.51
  6. Step 6: Final answer
    x = 21,869.53

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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.