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Finding the Fourth Proportional to 7,889.78, 10,887.81 and 4,353

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Solution

The fourth proportional to 7,889.78, 10,887.81 and 4,353 is: 6,007.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,889.78 : 10,887.81 = 4,353 : x
  2. Step 2: Convert to fraction form
    7,889.78/10,887.81 = 4,353/x
  3. Step 3: Cross multiply
    7,889.78x = 10,887.81 × 4,353
  4. Step 4: Simplify right side
    7,889.78x = 47,394,636.93
  5. Step 5: Solve for x
    x = 47,394,636.93/7,889.78
  6. Step 6: Final answer
    x = 6,007.10

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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.