Home / 20,515.94-28,304.38-15,736.74

Finding the Fourth Proportional to 20,515.94, 28,304.38 and 15,736.74

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Solution

The fourth proportional to 20,515.94, 28,304.38 and 15,736.74 is: 21,710.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.94 : 28,304.38 = 15,736.74 : x
  2. Step 2: Convert to fraction form
    20,515.94/28,304.38 = 15,736.74/x
  3. Step 3: Cross multiply
    20,515.94x = 28,304.38 × 15,736.74
  4. Step 4: Simplify right side
    20,515.94x = 445,418,668.92
  5. Step 5: Solve for x
    x = 445,418,668.92/20,515.94
  6. Step 6: Final answer
    x = 21,710.86

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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.