Home / 28,776.89-39,713.19-15,856.71

Finding the Fourth Proportional to 28,776.89, 39,713.19 and 15,856.71

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Solution

The fourth proportional to 28,776.89, 39,713.19 and 15,856.71 is: 21,882.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,776.89 : 39,713.19 = 15,856.71 : x
  2. Step 2: Convert to fraction form
    28,776.89/39,713.19 = 15,856.71/x
  3. Step 3: Cross multiply
    28,776.89x = 39,713.19 × 15,856.71
  4. Step 4: Simplify right side
    28,776.89x = 629,720,537.00
  5. Step 5: Solve for x
    x = 629,720,537.00/28,776.89
  6. Step 6: Final answer
    x = 21,882.86

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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.