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Finding the Fourth Proportional to 12,393.76, 17,103.52 and 6,728.56

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Solution

The fourth proportional to 12,393.76, 17,103.52 and 6,728.56 is: 9,285.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,393.76 : 17,103.52 = 6,728.56 : x
  2. Step 2: Convert to fraction form
    12,393.76/17,103.52 = 6,728.56/x
  3. Step 3: Cross multiply
    12,393.76x = 17,103.52 × 6,728.56
  4. Step 4: Simplify right side
    12,393.76x = 115,082,074.29
  5. Step 5: Solve for x
    x = 115,082,074.29/12,393.76
  6. Step 6: Final answer
    x = 9,285.49

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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.