Home / 8,919.79-12,308.31-4,939.92

Finding the Fourth Proportional to 8,919.79, 12,308.31 and 4,939.92

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Solution

The fourth proportional to 8,919.79, 12,308.31 and 4,939.92 is: 6,816.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919.79 : 12,308.31 = 4,939.92 : x
  2. Step 2: Convert to fraction form
    8,919.79/12,308.31 = 4,939.92/x
  3. Step 3: Cross multiply
    8,919.79x = 12,308.31 × 4,939.92
  4. Step 4: Simplify right side
    8,919.79x = 60,802,066.74
  5. Step 5: Solve for x
    x = 60,802,066.74/8,919.79
  6. Step 6: Final answer
    x = 6,816.54

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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.