Home / 21,403.25-29,536.60-11,971.81

Finding the Fourth Proportional to 21,403.25, 29,536.60 and 11,971.81

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Solution

The fourth proportional to 21,403.25, 29,536.60 and 11,971.81 is: 16,521.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,403.25 : 29,536.60 = 11,971.81 : x
  2. Step 2: Convert to fraction form
    21,403.25/29,536.60 = 11,971.81/x
  3. Step 3: Cross multiply
    21,403.25x = 29,536.60 × 11,971.81
  4. Step 4: Simplify right side
    21,403.25x = 353,606,563.25
  5. Step 5: Solve for x
    x = 353,606,563.25/21,403.25
  6. Step 6: Final answer
    x = 16,521.16

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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.