Home / 27,780.64-38,243.28-21,481.12

Finding the Fourth Proportional to 27,780.64, 38,243.28 and 21,481.12

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Solution

The fourth proportional to 27,780.64, 38,243.28 and 21,481.12 is: 29,571.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,780.64 : 38,243.28 = 21,481.12 : x
  2. Step 2: Convert to fraction form
    27,780.64/38,243.28 = 21,481.12/x
  3. Step 3: Cross multiply
    27,780.64x = 38,243.28 × 21,481.12
  4. Step 4: Simplify right side
    27,780.64x = 821,508,486.87
  5. Step 5: Solve for x
    x = 821,508,486.87/27,780.64
  6. Step 6: Final answer
    x = 29,571.26

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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.