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Finding the Fourth Proportional to 12,250, 16,905.08 and 6,661.20

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Solution

The fourth proportional to 12,250, 16,905.08 and 6,661.20 is: 9,192.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,250 : 16,905.08 = 6,661.20 : x
  2. Step 2: Convert to fraction form
    12,250/16,905.08 = 6,661.20/x
  3. Step 3: Cross multiply
    12,250x = 16,905.08 × 6,661.20
  4. Step 4: Simplify right side
    12,250x = 112,608,118.90
  5. Step 5: Solve for x
    x = 112,608,118.90/12,250
  6. Step 6: Final answer
    x = 9,192.50

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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.