Home / 27,780.76-38,338.08-15,205.54

Finding the Fourth Proportional to 27,780.76, 38,338.08 and 15,205.54

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Solution

The fourth proportional to 27,780.76, 38,338.08 and 15,205.54 is: 20,983.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,780.76 : 38,338.08 = 15,205.54 : x
  2. Step 2: Convert to fraction form
    27,780.76/38,338.08 = 15,205.54/x
  3. Step 3: Cross multiply
    27,780.76x = 38,338.08 × 15,205.54
  4. Step 4: Simplify right side
    27,780.76x = 582,951,208.96
  5. Step 5: Solve for x
    x = 582,951,208.96/27,780.76
  6. Step 6: Final answer
    x = 20,983.99

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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.