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Finding the Fourth Proportional to 28,504.47, 42,719.04 and 20,633.31

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Solution

The fourth proportional to 28,504.47, 42,719.04 and 20,633.31 is: 30,922.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,504.47 : 42,719.04 = 20,633.31 : x
  2. Step 2: Convert to fraction form
    28,504.47/42,719.04 = 20,633.31/x
  3. Step 3: Cross multiply
    28,504.47x = 42,719.04 × 20,633.31
  4. Step 4: Simplify right side
    28,504.47x = 881,435,195.22
  5. Step 5: Solve for x
    x = 881,435,195.22/28,504.47
  6. Step 6: Final answer
    x = 30,922.70

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Why These Related Problems?

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