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Finding the Fourth Proportional to 12,393.60, 17,103.05 and 6,728.23

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Solution

The fourth proportional to 12,393.60, 17,103.05 and 6,728.23 is: 9,284.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,393.60 : 17,103.05 = 6,728.23 : x
  2. Step 2: Convert to fraction form
    12,393.60/17,103.05 = 6,728.23/x
  3. Step 3: Cross multiply
    12,393.60x = 17,103.05 × 6,728.23
  4. Step 4: Simplify right side
    12,393.60x = 115,073,228.16
  5. Step 5: Solve for x
    x = 115,073,228.16/12,393.60
  6. Step 6: Final answer
    x = 9,284.89

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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.