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Finding the Fourth Proportional to 12,109.98, 16,711.98 and 6,804.78

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Solution

The fourth proportional to 12,109.98, 16,711.98 and 6,804.78 is: 9,390.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,109.98 : 16,711.98 = 6,804.78 : x
  2. Step 2: Convert to fraction form
    12,109.98/16,711.98 = 6,804.78/x
  3. Step 3: Cross multiply
    12,109.98x = 16,711.98 × 6,804.78
  4. Step 4: Simplify right side
    12,109.98x = 113,721,347.26
  5. Step 5: Solve for x
    x = 113,721,347.26/12,109.98
  6. Step 6: Final answer
    x = 9,390.71

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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.