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Finding the Fourth Proportional to 19,699.68, 29,542.69 and 5,655.90

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Solution

The fourth proportional to 19,699.68, 29,542.69 and 5,655.90 is: 8,481.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,699.68 : 29,542.69 = 5,655.90 : x
  2. Step 2: Convert to fraction form
    19,699.68/29,542.69 = 5,655.90/x
  3. Step 3: Cross multiply
    19,699.68x = 29,542.69 × 5,655.90
  4. Step 4: Simplify right side
    19,699.68x = 167,090,500.37
  5. Step 5: Solve for x
    x = 167,090,500.37/19,699.68
  6. Step 6: Final answer
    x = 8,481.89

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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.