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Finding the Fourth Proportional to 7,908.60, 11,862.90 and 4,992.60

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Solution

The fourth proportional to 7,908.60, 11,862.90 and 4,992.60 is: 7,488.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,908.60 : 11,862.90 = 4,992.60 : x
  2. Step 2: Convert to fraction form
    7,908.60/11,862.90 = 4,992.60/x
  3. Step 3: Cross multiply
    7,908.60x = 11,862.90 × 4,992.60
  4. Step 4: Simplify right side
    7,908.60x = 59,226,714.54
  5. Step 5: Solve for x
    x = 59,226,714.54/7,908.60
  6. Step 6: Final answer
    x = 7,488.90

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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.