Home / 27,890.82-38,489.33-15,315.57

Finding the Fourth Proportional to 27,890.82, 38,489.33 and 15,315.57

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Solution

The fourth proportional to 27,890.82, 38,489.33 and 15,315.57 is: 21,135.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,890.82 : 38,489.33 = 15,315.57 : x
  2. Step 2: Convert to fraction form
    27,890.82/38,489.33 = 15,315.57/x
  3. Step 3: Cross multiply
    27,890.82x = 38,489.33 × 15,315.57
  4. Step 4: Simplify right side
    27,890.82x = 589,485,951.29
  5. Step 5: Solve for x
    x = 589,485,951.29/27,890.82
  6. Step 6: Final answer
    x = 21,135.48

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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.