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Finding the Fourth Proportional to 12,169.80, 16,789.02 and 7,134.22

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Solution

The fourth proportional to 12,169.80, 16,789.02 and 7,134.22 is: 9,842.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,169.80 : 16,789.02 = 7,134.22 : x
  2. Step 2: Convert to fraction form
    12,169.80/16,789.02 = 7,134.22/x
  3. Step 3: Cross multiply
    12,169.80x = 16,789.02 × 7,134.22
  4. Step 4: Simplify right side
    12,169.80x = 119,776,562.26
  5. Step 5: Solve for x
    x = 119,776,562.26/12,169.80
  6. Step 6: Final answer
    x = 9,842.11

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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.