Home / 20,605.14-28,441.80-12,107.12

Finding the Fourth Proportional to 20,605.14, 28,441.80 and 12,107.12

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Solution

The fourth proportional to 20,605.14, 28,441.80 and 12,107.12 is: 16,711.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.14 : 28,441.80 = 12,107.12 : x
  2. Step 2: Convert to fraction form
    20,605.14/28,441.80 = 12,107.12/x
  3. Step 3: Cross multiply
    20,605.14x = 28,441.80 × 12,107.12
  4. Step 4: Simplify right side
    20,605.14x = 344,348,143.41
  5. Step 5: Solve for x
    x = 344,348,143.41/20,605.14
  6. Step 6: Final answer
    x = 16,711.76

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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.