Home / 21,456.48-29,617.20-13,512

Finding the Fourth Proportional to 21,456.48, 29,617.20 and 13,512

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Solution

The fourth proportional to 21,456.48, 29,617.20 and 13,512 is: 18,651.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,456.48 : 29,617.20 = 13,512 : x
  2. Step 2: Convert to fraction form
    21,456.48/29,617.20 = 13,512/x
  3. Step 3: Cross multiply
    21,456.48x = 29,617.20 × 13,512
  4. Step 4: Simplify right side
    21,456.48x = 400,187,606.40
  5. Step 5: Solve for x
    x = 400,187,606.40/21,456.48
  6. Step 6: Final answer
    x = 18,651.13

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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.