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Finding the Fourth Proportional to 8,958.93, 12,362.78 and 4,979.90

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Solution

The fourth proportional to 8,958.93, 12,362.78 and 4,979.90 is: 6,871.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,958.93 : 12,362.78 = 4,979.90 : x
  2. Step 2: Convert to fraction form
    8,958.93/12,362.78 = 4,979.90/x
  3. Step 3: Cross multiply
    8,958.93x = 12,362.78 × 4,979.90
  4. Step 4: Simplify right side
    8,958.93x = 61,565,408.12
  5. Step 5: Solve for x
    x = 61,565,408.12/8,958.93
  6. Step 6: Final answer
    x = 6,871.96

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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.