Home / 21,155.43-29,197.70-13,502

Finding the Fourth Proportional to 21,155.43, 29,197.70 and 13,502

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Solution

The fourth proportional to 21,155.43, 29,197.70 and 13,502 is: 18,634.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.43 : 29,197.70 = 13,502 : x
  2. Step 2: Convert to fraction form
    21,155.43/29,197.70 = 13,502/x
  3. Step 3: Cross multiply
    21,155.43x = 29,197.70 × 13,502
  4. Step 4: Simplify right side
    21,155.43x = 394,227,345.40
  5. Step 5: Solve for x
    x = 394,227,345.40/21,155.43
  6. Step 6: Final answer
    x = 18,634.81

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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.