Home / 20,605.34-28,431.57-12,108.85

Finding the Fourth Proportional to 20,605.34, 28,431.57 and 12,108.85

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Solution

The fourth proportional to 20,605.34, 28,431.57 and 12,108.85 is: 16,707.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.34 : 28,431.57 = 12,108.85 : x
  2. Step 2: Convert to fraction form
    20,605.34/28,431.57 = 12,108.85/x
  3. Step 3: Cross multiply
    20,605.34x = 28,431.57 × 12,108.85
  4. Step 4: Simplify right side
    20,605.34x = 344,273,616.39
  5. Step 5: Solve for x
    x = 344,273,616.39/20,605.34
  6. Step 6: Final answer
    x = 16,707.98

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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.