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Finding the Fourth Proportional to 7,886.76, 11,830.14 and 3,992.28

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Solution

The fourth proportional to 7,886.76, 11,830.14 and 3,992.28 is: 5,988.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,886.76 : 11,830.14 = 3,992.28 : x
  2. Step 2: Convert to fraction form
    7,886.76/11,830.14 = 3,992.28/x
  3. Step 3: Cross multiply
    7,886.76x = 11,830.14 × 3,992.28
  4. Step 4: Simplify right side
    7,886.76x = 47,229,231.32
  5. Step 5: Solve for x
    x = 47,229,231.32/7,886.76
  6. Step 6: Final answer
    x = 5,988.42

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