Home / 28,568.76-39,422.70-15,991.80

Finding the Fourth Proportional to 28,568.76, 39,422.70 and 15,991.80

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Solution

The fourth proportional to 28,568.76, 39,422.70 and 15,991.80 is: 22,067.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,568.76 : 39,422.70 = 15,991.80 : x
  2. Step 2: Convert to fraction form
    28,568.76/39,422.70 = 15,991.80/x
  3. Step 3: Cross multiply
    28,568.76x = 39,422.70 × 15,991.80
  4. Step 4: Simplify right side
    28,568.76x = 630,439,933.86
  5. Step 5: Solve for x
    x = 630,439,933.86/28,568.76
  6. Step 6: Final answer
    x = 22,067.46

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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.