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Finding the Fourth Proportional to 7,887.96, 10,879.25 and 5,055.62

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Solution

The fourth proportional to 7,887.96, 10,879.25 and 5,055.62 is: 6,972.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,887.96 : 10,879.25 = 5,055.62 : x
  2. Step 2: Convert to fraction form
    7,887.96/10,879.25 = 5,055.62/x
  3. Step 3: Cross multiply
    7,887.96x = 10,879.25 × 5,055.62
  4. Step 4: Simplify right side
    7,887.96x = 55,001,274.21
  5. Step 5: Solve for x
    x = 55,001,274.21/7,887.96
  6. Step 6: Final answer
    x = 6,972.81

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1.5x scale

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.