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Finding the Fourth Proportional to 12,998.28, 17,927.50 and 11,939.32

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Solution

The fourth proportional to 12,998.28, 17,927.50 and 11,939.32 is: 16,466.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,998.28 : 17,927.50 = 11,939.32 : x
  2. Step 2: Convert to fraction form
    12,998.28/17,927.50 = 11,939.32/x
  3. Step 3: Cross multiply
    12,998.28x = 17,927.50 × 11,939.32
  4. Step 4: Simplify right side
    12,998.28x = 214,042,159.30
  5. Step 5: Solve for x
    x = 214,042,159.30/12,998.28
  6. Step 6: Final answer
    x = 16,466.96

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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.