Home / 21,688.52-29,918.62-13,193.24

Finding the Fourth Proportional to 21,688.52, 29,918.62 and 13,193.24

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Solution

The fourth proportional to 21,688.52, 29,918.62 and 13,193.24 is: 18,199.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,688.52 : 29,918.62 = 13,193.24 : x
  2. Step 2: Convert to fraction form
    21,688.52/29,918.62 = 13,193.24/x
  3. Step 3: Cross multiply
    21,688.52x = 29,918.62 × 13,193.24
  4. Step 4: Simplify right side
    21,688.52x = 394,723,534.13
  5. Step 5: Solve for x
    x = 394,723,534.13/21,688.52
  6. Step 6: Final answer
    x = 18,199.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.