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Finding the Fourth Proportional to 12,305.77, 16,981.57 and 6,928.49

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Solution

The fourth proportional to 12,305.77, 16,981.57 and 6,928.49 is: 9,561.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,305.77 : 16,981.57 = 6,928.49 : x
  2. Step 2: Convert to fraction form
    12,305.77/16,981.57 = 6,928.49/x
  3. Step 3: Cross multiply
    12,305.77x = 16,981.57 × 6,928.49
  4. Step 4: Simplify right side
    12,305.77x = 117,656,613.01
  5. Step 5: Solve for x
    x = 117,656,613.01/12,305.77
  6. Step 6: Final answer
    x = 9,561.09

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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.