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Finding the Fourth Proportional to 12,227.66, 16,871.36 and 6,921.32

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Solution

The fourth proportional to 12,227.66, 16,871.36 and 6,921.32 is: 9,549.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,227.66 : 16,871.36 = 6,921.32 : x
  2. Step 2: Convert to fraction form
    12,227.66/16,871.36 = 6,921.32/x
  3. Step 3: Cross multiply
    12,227.66x = 16,871.36 × 6,921.32
  4. Step 4: Simplify right side
    12,227.66x = 116,772,081.40
  5. Step 5: Solve for x
    x = 116,772,081.40/12,227.66
  6. Step 6: Final answer
    x = 9,549.83

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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.