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Finding the Fourth Proportional to 12,239.91, 16,891.13 and 6,935.76

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Solution

The fourth proportional to 12,239.91, 16,891.13 and 6,935.76 is: 9,571.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,239.91 : 16,891.13 = 6,935.76 : x
  2. Step 2: Convert to fraction form
    12,239.91/16,891.13 = 6,935.76/x
  3. Step 3: Cross multiply
    12,239.91x = 16,891.13 × 6,935.76
  4. Step 4: Simplify right side
    12,239.91x = 117,152,841.15
  5. Step 5: Solve for x
    x = 117,152,841.15/12,239.91
  6. Step 6: Final answer
    x = 9,571.38

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Half scale
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Double scale
Find fourth proportional to 12,240.91, 16,892.51 and 6,936.76
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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.