Home / 12,115.08-16,718.82-6,809.88

Finding the Fourth Proportional to 12,115.08, 16,718.82 and 6,809.88

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Solution

The fourth proportional to 12,115.08, 16,718.82 and 6,809.88 is: 9,397.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,115.08 : 16,718.82 = 6,809.88 : x
  2. Step 2: Convert to fraction form
    12,115.08/16,718.82 = 6,809.88/x
  3. Step 3: Cross multiply
    12,115.08x = 16,718.82 × 6,809.88
  4. Step 4: Simplify right side
    12,115.08x = 113,853,157.94
  5. Step 5: Solve for x
    x = 113,853,157.94/12,115.08
  6. Step 6: Final answer
    x = 9,397.64

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Half scale
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Double scale
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Similar ratio
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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.