Home / 38,419.88-53,015.54-21,422.51

Finding the Fourth Proportional to 38,419.88, 53,015.54 and 21,422.51

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Solution

The fourth proportional to 38,419.88, 53,015.54 and 21,422.51 is: 29,560.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,419.88 : 53,015.54 = 21,422.51 : x
  2. Step 2: Convert to fraction form
    38,419.88/53,015.54 = 21,422.51/x
  3. Step 3: Cross multiply
    38,419.88x = 53,015.54 × 21,422.51
  4. Step 4: Simplify right side
    38,419.88x = 1,135,725,563.62
  5. Step 5: Solve for x
    x = 1,135,725,563.62/38,419.88
  6. Step 6: Final answer
    x = 29,560.89

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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.