Home / 7,917.48-11,878.65-4,991.76

Finding the Fourth Proportional to 7,917.48, 11,878.65 and 4,991.76

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Solution

The fourth proportional to 7,917.48, 11,878.65 and 4,991.76 is: 7,489.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,917.48 : 11,878.65 = 4,991.76 : x
  2. Step 2: Convert to fraction form
    7,917.48/11,878.65 = 4,991.76/x
  3. Step 3: Cross multiply
    7,917.48x = 11,878.65 × 4,991.76
  4. Step 4: Simplify right side
    7,917.48x = 59,295,369.92
  5. Step 5: Solve for x
    x = 59,295,369.92/7,917.48
  6. Step 6: Final answer
    x = 7,489.17

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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.