Home / 21,108.31-29,128.44-11,548.69

Finding the Fourth Proportional to 21,108.31, 29,128.44 and 11,548.69

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Solution

The fourth proportional to 21,108.31, 29,128.44 and 11,548.69 is: 15,936.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,108.31 : 29,128.44 = 11,548.69 : x
  2. Step 2: Convert to fraction form
    21,108.31/29,128.44 = 11,548.69/x
  3. Step 3: Cross multiply
    21,108.31x = 29,128.44 × 11,548.69
  4. Step 4: Simplify right side
    21,108.31x = 336,395,323.74
  5. Step 5: Solve for x
    x = 336,395,323.74/21,108.31
  6. Step 6: Final answer
    x = 15,936.63

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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.