Home / 20,986.31-28,960.74-12,033.27

Finding the Fourth Proportional to 20,986.31, 28,960.74 and 12,033.27

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Solution

The fourth proportional to 20,986.31, 28,960.74 and 12,033.27 is: 16,605.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.31 : 28,960.74 = 12,033.27 : x
  2. Step 2: Convert to fraction form
    20,986.31/28,960.74 = 12,033.27/x
  3. Step 3: Cross multiply
    20,986.31x = 28,960.74 × 12,033.27
  4. Step 4: Simplify right side
    20,986.31x = 348,492,403.82
  5. Step 5: Solve for x
    x = 348,492,403.82/20,986.31
  6. Step 6: Final answer
    x = 16,605.71

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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.