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Finding the Fourth Proportional to 12,220.75, 16,864.65 and 6,631.75

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Solution

The fourth proportional to 12,220.75, 16,864.65 and 6,631.75 is: 9,151.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,220.75 : 16,864.65 = 6,631.75 : x
  2. Step 2: Convert to fraction form
    12,220.75/16,864.65 = 6,631.75/x
  3. Step 3: Cross multiply
    12,220.75x = 16,864.65 × 6,631.75
  4. Step 4: Simplify right side
    12,220.75x = 111,842,142.64
  5. Step 5: Solve for x
    x = 111,842,142.64/12,220.75
  6. Step 6: Final answer
    x = 9,151.82

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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.