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Finding the Fourth Proportional to 28,362, 42,468.68 and 19,996.74

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Solution

The fourth proportional to 28,362, 42,468.68 and 19,996.74 is: 29,942.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,362 : 42,468.68 = 19,996.74 : x
  2. Step 2: Convert to fraction form
    28,362/42,468.68 = 19,996.74/x
  3. Step 3: Cross multiply
    28,362x = 42,468.68 × 19,996.74
  4. Step 4: Simplify right side
    28,362x = 849,235,152.10
  5. Step 5: Solve for x
    x = 849,235,152.10/28,362
  6. Step 6: Final answer
    x = 29,942.71

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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.