Home / 27,819.12-38,390.40-15,243.88

Finding the Fourth Proportional to 27,819.12, 38,390.40 and 15,243.88

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Solution

The fourth proportional to 27,819.12, 38,390.40 and 15,243.88 is: 21,036.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,819.12 : 38,390.40 = 15,243.88 : x
  2. Step 2: Convert to fraction form
    27,819.12/38,390.40 = 15,243.88/x
  3. Step 3: Cross multiply
    27,819.12x = 38,390.40 × 15,243.88
  4. Step 4: Simplify right side
    27,819.12x = 585,218,650.75
  5. Step 5: Solve for x
    x = 585,218,650.75/27,819.12
  6. Step 6: Final answer
    x = 21,036.56

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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.