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Finding the Fourth Proportional to 8,115.63, 12,173.45 and 1,959.63

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Solution

The fourth proportional to 8,115.63, 12,173.45 and 1,959.63 is: 2,939.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115.63 : 12,173.45 = 1,959.63 : x
  2. Step 2: Convert to fraction form
    8,115.63/12,173.45 = 1,959.63/x
  3. Step 3: Cross multiply
    8,115.63x = 12,173.45 × 1,959.63
  4. Step 4: Simplify right side
    8,115.63x = 23,855,448.03
  5. Step 5: Solve for x
    x = 23,855,448.03/8,115.63
  6. Step 6: Final answer
    x = 2,939.45

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.