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Finding the Fourth Proportional to 7,887.78, 10,883.97 and 5,239.08

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Solution

The fourth proportional to 7,887.78, 10,883.97 and 5,239.08 is: 7,229.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,887.78 : 10,883.97 = 5,239.08 : x
  2. Step 2: Convert to fraction form
    7,887.78/10,883.97 = 5,239.08/x
  3. Step 3: Cross multiply
    7,887.78x = 10,883.97 × 5,239.08
  4. Step 4: Simplify right side
    7,887.78x = 57,021,989.55
  5. Step 5: Solve for x
    x = 57,021,989.55/7,887.78
  6. Step 6: Final answer
    x = 7,229.16

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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.