Home / 21,309.13-29,406.80-11,749.36

Finding the Fourth Proportional to 21,309.13, 29,406.80 and 11,749.36

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Solution

The fourth proportional to 21,309.13, 29,406.80 and 11,749.36 is: 16,214.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,309.13 : 29,406.80 = 11,749.36 : x
  2. Step 2: Convert to fraction form
    21,309.13/29,406.80 = 11,749.36/x
  3. Step 3: Cross multiply
    21,309.13x = 29,406.80 × 11,749.36
  4. Step 4: Simplify right side
    21,309.13x = 345,511,109.02
  5. Step 5: Solve for x
    x = 345,511,109.02/21,309.13
  6. Step 6: Final answer
    x = 16,214.23

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1.5x scale

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.