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Finding the Fourth Proportional to 12,139.80, 16,753.24 and 6,834.81

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Solution

The fourth proportional to 12,139.80, 16,753.24 and 6,834.81 is: 9,432.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.80 : 16,753.24 = 6,834.81 : x
  2. Step 2: Convert to fraction form
    12,139.80/16,753.24 = 6,834.81/x
  3. Step 3: Cross multiply
    12,139.80x = 16,753.24 × 6,834.81
  4. Step 4: Simplify right side
    12,139.80x = 114,505,212.28
  5. Step 5: Solve for x
    x = 114,505,212.28/12,139.80
  6. Step 6: Final answer
    x = 9,432.22

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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.