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Finding the Fourth Proportional to 20,451.99, 28,237.73 and 15,663.48

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Solution

The fourth proportional to 20,451.99, 28,237.73 and 15,663.48 is: 21,626.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,451.99 : 28,237.73 = 15,663.48 : x
  2. Step 2: Convert to fraction form
    20,451.99/28,237.73 = 15,663.48/x
  3. Step 3: Cross multiply
    20,451.99x = 28,237.73 × 15,663.48
  4. Step 4: Simplify right side
    20,451.99x = 442,301,023.00
  5. Step 5: Solve for x
    x = 442,301,023.00/20,451.99
  6. Step 6: Final answer
    x = 21,626.30

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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.