Home / 21,309.33-29,406.96-12,816.36

Finding the Fourth Proportional to 21,309.33, 29,406.96 and 12,816.36

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Solution

The fourth proportional to 21,309.33, 29,406.96 and 12,816.36 is: 17,686.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,309.33 : 29,406.96 = 12,816.36 : x
  2. Step 2: Convert to fraction form
    21,309.33/29,406.96 = 12,816.36/x
  3. Step 3: Cross multiply
    21,309.33x = 29,406.96 × 12,816.36
  4. Step 4: Simplify right side
    21,309.33x = 376,890,185.87
  5. Step 5: Solve for x
    x = 376,890,185.87/21,309.33
  6. Step 6: Final answer
    x = 17,686.63

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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.